{"id":31959,"date":"2025-10-08T13:44:31","date_gmt":"2025-10-08T13:44:31","guid":{"rendered":"https:\/\/1-grid.com\/knowledge\/?post_type=ht_kb&#038;p=31959"},"modified":"2026-02-23T13:15:23","modified_gmt":"2026-02-23T13:15:23","slug":"preventing-bounce-back-or-spam-issues-when-sending-to-gmail","status":"publish","type":"ht_kb","link":"https:\/\/1grid.co.za\/knowledge\/preventing-bounce-back-or-spam-issues-when-sending-to-gmail\/","title":{"rendered":"Preventing Bounce Back or Spam Issues When Sending to Gmail\u00a0"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p id=\"htoc-111111111111111111111111111111111\"><\/p>\n<\/blockquote>\n\n\n\n<p>Gmail and other providers use strict filters to protect users from spam. Unfortunately, even legitimate emails can be flagged or blocked. Most email delivery issues, like bounce back and spam issues, can be avoided with correct authentication, clean sending practices, and proper domain configuration.&nbsp;&nbsp;<\/p>\n\n\n\n<p>This guide helps you understand why it happens and how to fix it. By following these steps, you can dramatically improve your email reputation, avoid Gmail blocks, and ensure that your messages reach inboxes instead of spam folders.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"600\" src=\"https:\/\/1grid.co.za\/knowledge\/wp-content\/uploads\/2023\/03\/1-grid-Images-for-KB-Articles-1000-x-600-px-43.png\" alt=\"\" class=\"wp-image-33777\"\/><\/figure>\n\n\n\n<div class=\"wp-block-ht-block-toc is-style-rounded htoc htoc--position-wide toc-list-style-plain\" data-htoc-state=\"expanded\"><span class=\"htoc__title\"><span class=\"ht_toc_title\">Table of Contents<\/span><span class=\"htoc__toggle\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"16\" height=\"16\"><g fill=\"#444\"><path d=\"M15 7H1c-.6 0-1 .4-1 1s.4 1 1 1h14c.6 0 1-.4 1-1s-.4-1-1-1z\"><\/path><path d=\"M15 1H1c-.6 0-1 .4-1 1s.4 1 1 1h14c.6 0 1-.4 1-1s-.4-1-1-1zM15 13H1c-.6 0-1 .4-1 1s.4 1 1 1h14c.6 0 1-.4 1-1s-.4-1-1-1z\"><\/path><\/g><\/svg><\/span><\/span><div class=\"htoc__itemswrap\"><ul class=\"ht_toc_list\"><li class=\"\"><a href=\"#htoc-\">Why Emails Land in Spam or Bounce<\/a><\/li><li class=\"\"><a href=\"#htoc-111\">3 Common Gmail Errors<\/a><\/li><li class=\"\"><a href=\"#htoc-111111111111111111111111\">Resolving a \u201c550-5.7.26 This message does not pass authentication checks\u201d&nbsp;Error<\/a><\/li><li class=\"\"><a href=\"#htoc-11111111\">Prevention Steps<\/a><ul class=\"ht_toc_child_list\"><li class=\"\"><a href=\"#htoc-111111111\">1: Authenticate Your Domain<\/a><\/li><li class=\"\"><a href=\"#htoc-111111111111\">2: Follow Sending Best Practices<\/a><\/li><li class=\"\"><a href=\"#htoc-111111111111111\">3: Test and Monitor<\/a><\/li><\/ul><\/li><li class=\"\"><a href=\"#htoc-111111111111111111\">When to Contact 1-grid Support<\/a><\/li><li class=\"\"><a href=\"#htoc-1111111111111111111111111\">FAQs<\/a><\/li><li class=\"\"><a href=\"#htoc-1111111111111111111111111111111\">Additional Resources&nbsp;<\/a><\/li><\/ul><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-\"><strong>Why Emails Land in Spam or Bounce<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-1\">Gmail applies reputation and authentication checks.&nbsp;<\/li>\n\n\n\n<li id=\"htoc-missing-or-misconfigured-dns-records-spf-dkim-dmarc\">Missing or misconfigured DNS records (SPF, DKIM, DMARC).&nbsp;<\/li>\n\n\n\n<li id=\"htoc-bulk-emails-sent-to-invalid-or-unverified-recipients\">Bulk emails are sent to invalid or unverified recipients.&nbsp;<\/li>\n\n\n\n<li id=\"htoc-11\">Suspicious message content (keywords, attachments).&nbsp;<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-111\"><strong>3 <strong>C<\/strong>ommon Gmail Errors<\/strong><\/h2>\n\n\n\n<p><span style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"><a href=\"https:\/\/support.google.com\/mail\/answer\/3726730?hl=en\" target=\"_blank\"><strong>Several<\/strong><\/a><\/span><a href=\"https:\/\/support.google.com\/mail\/answer\/3726730?hl=en\" target=\"_blank\" rel=\"noreferrer noopener\"><strong> errors may happen when sending to Gmail accounts<\/strong><\/a>, but we\u2019ve highlighted the <strong>top 4 common issues<\/strong>, and we also have a <a href=\"https:\/\/1grid.co.za\/knowledge\/resolving-email-error-messages-when-sending-to-gmail-accounts\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>quick guide<\/strong><\/a> to help you troubleshoot some of these.&nbsp;&nbsp;<\/p>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>\u201c<\/strong><a href=\"https:\/\/www.google.com\/search?q=gmail+error+Message+blocked&amp;sca_esv=d1d26e03a6da53f6&amp;rlz=1C1GCEU_enZA1059ZA1063&amp;sxsrf=AE3TifN1Qrdg6nN_J-VI531n-tYdP6Gntg%3A1759393221778&amp;ei=xTXeaI-mL-aghbIP-srfiA8&amp;ved=0ahUKEwjPnITAioWQAxVmUEEAHXrlF_EQ4dUDCBA&amp;uact=5&amp;oq=gmail+error+Message+blocked&amp;gs_lp=Egxnd3Mtd2l6LXNlcnAiG2dtYWlsIGVycm9yIE1lc3NhZ2UgYmxvY2tlZDIFEAAYgAQyCxAAGIAEGJECGIoFMgsQABiABBiRAhiKBTILEAAYgAQYkQIYigUyCxAAGIAEGJECGIoFMgUQABiABDIKEAAYgAQYFBiHAjIFEAAYgAQyBRAAGIAEMgUQABiABEiyIVCaCVi1H3ABeAGQAQCYAe4CoAHPG6oBBTItOC40uAEDyAEA-AEB-AECmAINoAKTHMICChAAGLADGNYEGEfCAgQQIxgnwgIKECMYgAQYJxiKBcICFhAuGIAEGLEDGNEDGEMYgwEYxwEYigXCAhAQABiABBixAxhDGIMBGIoFwgILEAAYgAQYsQMYgwHCAggQABiABBixA8ICDRAAGIAEGLEDGBQYhwKYAwCIBgGQBgiSBwcxLjAuOC40oAfpULIHBTItOC40uAeNHMIHBDItMTPIBzQ&amp;sclient=gws-wiz-serp\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Message Blocked<\/strong><\/a><strong>\u201d<\/strong>&nbsp;<\/summary>\n<p id=\"htoc-1111\">Gmail flagged your domain as suspicious.&nbsp;<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>\u201c<\/strong><a href=\"https:\/\/www.google.com\/search?q=550-5.7.1+%5BIP%5D+Our+system+has+detected+unusual+rate+of+spam&amp;sca_esv=d1d26e03a6da53f6&amp;rlz=1C1GCEU_enZA1059ZA1063&amp;sxsrf=AE3TifMbNOjbPRZiYF2hKUwW95XF8oaOlw%3A1759392732935&amp;ei=3DPeaKfrOP7PhbIP4dfIuQc&amp;ved=0ahUKEwinyffWiIWQAxX-Z0EAHeErMncQ4dUDCBA&amp;uact=5&amp;oq=550-5.7.1+%5BIP%5D+Our+system+has+detected+unusual+rate+of+spam&amp;gs_lp=Egxnd3Mtd2l6LXNlcnAiOzU1MC01LjcuMSBbSVBdIE91ciBzeXN0ZW0gaGFzIGRldGVjdGVkIHVudXN1YWwgcmF0ZSBvZiBzcGFtSJADUABYAHAAeAGQAQCYAQCgAQCqAQC4AQPIAQD4AQL4AQGYAgCgAgCYAwCSBwCgBwCyBwC4BwDCBwDIBwA&amp;sclient=gws-wiz-serp\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>550-5.7.1 detected unusual spam-like activity<\/strong><\/a><strong>\u201d<\/strong>&nbsp;<\/summary>\n<p id=\"htoc-11111\">Reputation issue.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>\u201c<\/strong><a href=\"https:\/\/www.google.com\/search?q=421-4.7.28+This+message+does+not+meet+IPv6+sending+guidelines+&amp;sca_esv=d1d26e03a6da53f6&amp;rlz=1C1GCEU_enZA1059ZA1063&amp;sxsrf=AE3TifMbNOjbPRZiYF2hKUwW95XF8oaOlw%3A1759392732935&amp;ei=3DPeaKfrOP7PhbIP4dfIuQc&amp;ved=0ahUKEwinyffWiIWQAxX-Z0EAHeErMncQ4dUDCBA&amp;uact=5&amp;oq=421-4.7.28+This+message+does+not+meet+IPv6+sending+guidelines+&amp;gs_lp=Egxnd3Mtd2l6LXNlcnAiPjQyMS00LjcuMjggVGhpcyBtZXNzYWdlIGRvZXMgbm90IG1lZXQgSVB2NiBzZW5kaW5nIGd1aWRlbGluZXMgSJMDUABYAHAAeAGQAQCYAbsCoAG7AqoBAzMtMbgBA8gBAPgBAvgBAZgCAKACAJgDAJIHAKAHcrIHALgHAMIHAMgHAA&amp;sclient=gws-wiz-serp\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>421-4.7.28 does not meet IPv6 guidelines<\/strong><\/a><strong>\u201d<\/strong>&nbsp;<\/summary>\n<p id=\"htoc-111111\"><strong>DNS \/ <a href=\"https:\/\/support.google.com\/a\/answer\/81126?hl=en\" target=\"_blank\" rel=\"noreferrer noopener\">IPv6<\/a><\/strong> misconfigurations.&nbsp;<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>\u201c<\/strong><a href=\"https:\/\/www.google.com\/search?q=451+4.7.0+Temporary+rate+limit+exceeded&amp;sca_esv=d1d26e03a6da53f6&amp;rlz=1C1GCEU_enZA1059ZA1063&amp;sxsrf=AE3TifPMd4mWqtx4wjUD189AgIfgZyM2vQ%3A1759392632981&amp;ei=eDPeaIzYO7euhbIPuKDD2Q0&amp;ved=0ahUKEwiM9KKniIWQAxU3V0EAHTjQMNsQ4dUDCBA&amp;uact=5&amp;oq=451+4.7.0+Temporary+rate+limit+exceeded&amp;gs_lp=Egxnd3Mtd2l6LXNlcnAiJzQ1MSA0LjcuMCBUZW1wb3JhcnkgcmF0ZSBsaW1pdCBleGNlZWRlZDIKEAAYsAMY1gQYRzIKEAAYsAMY1gQYRzIKEAAYsAMY1gQYRzIKEAAYsAMY1gQYRzIKEAAYsAMY1gQYRzIKEAAYsAMY1gQYRzIKEAAYsAMY1gQYRzIKEAAYsAMY1gQYR0jECVD7Blj7BnABeAGQAQCYAQCgAQCqAQC4AQPIAQD4AQL4AQGYAgGgAguYAwCIBgGQBgiSBwExoAcAsgcAuAcAwgcDMy0xyAcJ&amp;sclient=gws-wiz-serp\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>451 4.7.0 Temporary rate limit exceeded<\/strong><\/a><strong>\u201d<\/strong>&nbsp;<\/summary>\n<p id=\"htoc-1111111\">Gmail is throttling message volume.&nbsp;<\/p>\n<\/details>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-111111111111111111111111\"><strong>Resolving a<\/strong> \u201c<a href=\"https:\/\/www.google.com\/search?q=550-5.7.1+%5BIP%5D+Our+system+has+detected+unusual+rate+of+spam&amp;sca_esv=d1d26e03a6da53f6&amp;rlz=1C1GCEU_enZA1059ZA1063&amp;sxsrf=AE3TifMbNOjbPRZiYF2hKUwW95XF8oaOlw%3A1759392732935&amp;ei=3DPeaKfrOP7PhbIP4dfIuQc&amp;ved=0ahUKEwinyffWiIWQAxX-Z0EAHeErMncQ4dUDCBA&amp;uact=5&amp;oq=550-5.7.1+%5BIP%5D+Our+system+has+detected+unusual+rate+of+spam&amp;gs_lp=Egxnd3Mtd2l6LXNlcnAiOzU1MC01LjcuMSBbSVBdIE91ciBzeXN0ZW0gaGFzIGRldGVjdGVkIHVudXN1YWwgcmF0ZSBvZiBzcGFtSJADUABYAHAAeAGQAQCYAQCgAQCqAQC4AQPIAQD4AQL4AQGYAgCgAgCYAwCSBwCgBwCyBwC4BwDCBwDIBwA&amp;sclient=gws-wiz-serp\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>550-5.7.26 This message does not pass authentication checks<\/strong><\/a>\u201d&nbsp;<strong>Error<\/strong><\/h2>\n\n\n\n<p>This bounce-back Gmail error message means&nbsp;your email is blocked because it lacks proper authentication, specifically SPF, DKIM, and DMARC records for your domain.&nbsp;To fix this, you must add these DNS records to prove your domain is legitimate and authorised to send emails, preventing your messages from being marked as spam or rejected by Gmail.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/s3.amazonaws.com\/cdn.freshdesk.com\/data\/helpdesk\/attachments\/production\/33092916677\/original\/EU5vZPolUYizHaT736xSJWh697FzJHyNjQ.png?1678712783\" alt=\"\" style=\"width:568px;height:307px\"\/><\/figure>\n<\/div>\n\n\n<p>Here are some steps below for updating the TXT (SPF) record to prevent this error message in future when sending to a Gmail account.<\/p>\n\n\n\n<p><strong>1.<\/strong>&nbsp;Log in to&nbsp;<strong><a href=\"https:\/\/1-grid.com\/knowledge\/how-to-log-in-to-cpanel-via-your-1-grid-customer-zone\/\">cPanel<\/a>.<\/strong><br><strong>2. <\/strong>Click on<strong>&nbsp;<strong>Zone Editor<\/strong>.&nbsp; &nbsp;<\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/s3.amazonaws.com\/cdn.freshdesk.com\/data\/helpdesk\/attachments\/production\/33092906413\/original\/jpixl8nmLf1mP1Qwtt0vNuOgGT38dYSK9Q.png?1678703746\" alt=\"\" style=\"aspect-ratio:2.826923076923077;width:486px;height:auto\"\/><\/figure>\n<\/div>\n\n\n<p><strong>3.<\/strong>&nbsp;Click on&nbsp;<strong>Manage<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/s3.amazonaws.com\/cdn.freshdesk.com\/data\/helpdesk\/attachments\/production\/33092906915\/original\/PzOiPDjoROM03i0zQerClFLx3eiemYj7zw.png?1678704265\" alt=\"\" style=\"width:495px;height:202px\"\/><\/figure>\n<\/div>\n\n\n<p><strong>4.<\/strong>&nbsp;Click on&nbsp;<strong>TXT<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/s3.amazonaws.com\/cdn.freshdesk.com\/data\/helpdesk\/attachments\/production\/33092907051\/original\/oqVcHwJYGyfy8VWE8dNPuYOp36qzfhDYAQ.png?1678704346\" alt=\"\" style=\"aspect-ratio:2.657303370786517;width:500px;height:auto\"\/><\/figure>\n<\/div>\n\n\n<p><strong>5.&nbsp;<\/strong>Click on&nbsp;<strong>Edit<\/strong>&nbsp;on the<strong> SPF record<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/s3.amazonaws.com\/cdn.freshdesk.com\/data\/helpdesk\/attachments\/production\/33092907174\/original\/82pM6T6secBI153uRqJpbbwvb5fd4shkwg.png?1678704468\" alt=\"\" style=\"width:585px;height:133px\"\/><\/figure>\n<\/div>\n\n\n<p><strong>6.&nbsp;<\/strong>Enter the standard record ( <em>v=spf1 include:relay.mailchannels.net ~all<\/em> ) and click on&nbsp;<strong>Save Record.<\/strong>&nbsp; <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/s3.amazonaws.com\/cdn.freshdesk.com\/data\/helpdesk\/attachments\/production\/33092907221\/original\/lMT_fV95knwK2lUQFJOtbjNsgjO5pQD3Sw.png?1678704561\" alt=\"\" style=\"width:585px;height:177px\"\/><\/figure>\n<\/div>\n\n\n<p><strong>NOTE: <\/strong>This will enforce Gmail updates not affecting the records, causing emails to bounce back when sending to Gmail accounts. The same applies to the <strong><a href=\"https:\/\/1-grid.com\/knowledge\/cpanel-how-to-generate-a-new-dkim-record-to-avoid-email-bounce-back-error-messages\/\">DKIM record<\/a> <\/strong>and <a href=\"https:\/\/1-grid.com\/knowledge\/cpanel-how-to-add-dmarc-record\/\"><strong>DMARC record<\/strong><\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-11111111\">Prevention Steps<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"htoc-111111111\"><strong>1: Authenticate Your Domain<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-1111111111\"><a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-setup-an-spf-record-cpanel\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>SPF<\/strong><\/a>: Defines which servers can send on behalf of your domain.&nbsp;<\/li>\n\n\n\n<li id=\"htoc-dkim-adds-a-cryptographic-signature-to-verify-messages\"><a href=\"https:\/\/1grid.co.za\/knowledge\/cpanel-how-to-generate-a-new-dkim-record\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>DKIM<\/strong><\/a>: Adds a cryptographic signature to verify messages.&nbsp;<\/li>\n\n\n\n<li id=\"htoc-11111111111\"><a href=\"https:\/\/1grid.co.za\/knowledge\/cpanel-how-to-add-dmarc-record\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>DMARC<\/strong><\/a>: Tells receiving servers how to handle unauthenticated mail.&nbsp;&nbsp;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"htoc-111111111111\"><strong>2: Follow Sending Best Practices<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-1111111111111\">Send only to <a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-resolve-mailchannels-error-550-too-many-invalid-recipients\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>verified, opt-in recipients<\/strong><\/a>.&nbsp;<\/li>\n\n\n\n<li id=\"htoc-avoid-spammy-subjects-free-urgent\"><strong><a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-avoid-mailchannels-blocks\/\" target=\"_blank\" rel=\"noreferrer noopener\">Avoid \u201cspammy\u201d subjects<\/a> <\/strong>(FREE, $$$, URGENT).&nbsp;<\/li>\n\n\n\n<li id=\"htoc-don-t-send-bulk-mail-without-proper-list-management-tools\">Don\u2019t send bulk mail without proper list management tools.&nbsp;<\/li>\n\n\n\n<li id=\"htoc-11111111111111\">Keep your <a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-resolve-mailchannels-error-550-too-many-invalid-recipients\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>mailing lists clean and updated<\/strong><\/a>.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"htoc-111111111111111\"><strong>3: Test and Monitor<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-1111111111111111\">Run messages through <a href=\"https:\/\/www.mail-tester.com\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>mail-tester.com<\/strong><\/a><strong>.<\/strong>&nbsp;<\/li>\n\n\n\n<li id=\"htoc-set-up-google-postmaster-tools-for-gmail-deliverability-feedback\">Set up <a href=\"https:\/\/gmail.com\/postmaster\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Google Postmaster Tools<\/strong><\/a> for Gmail deliverability feedback.&nbsp;<\/li>\n\n\n\n<li id=\"htoc-11111111111111111\">Monitor <a href=\"https:\/\/mxtoolbox.com\/dmarc.aspx\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>DMARC reports<\/strong><\/a> regularly.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-111111111111111111\"><strong>When to Contact 1-grid Support<\/strong><\/h2>\n\n\n\n<p>Reach out if:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-1111111111111111111\">Emails still bounce after SPF\/DKIM\/DMARC are configured.&nbsp;<\/li>\n\n\n\n<li id=\"htoc-gmail-continues-to-flag-your-domain\">Gmail continues to flag your domain.&nbsp;<\/li>\n\n\n\n<li id=\"htoc-11111111111111111111\"><strong><a href=\"https:\/\/1grid.co.za\/knowledge\/mailchannels-errors-codes\/\" target=\"_blank\" rel=\"noreferrer noopener\">MailChannels block notices<\/a> <\/strong>persist after following best practices.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p>Be sure to provide: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-111111111111111111111\">Troubleshooting steps that you have taken.<\/li>\n\n\n\n<li id=\"htoc-1111111111111111111111\">Screenshots of the error message you are getting.<\/li>\n\n\n\n<li id=\"htoc-11111111111111111111111\">Confirm if any changes have been made to your DNS records.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color\" id=\"htoc-1111111111111111111111111\"><strong>FAQs<\/strong><\/h2>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Will enabling SPF, DKIM, and DMARC stop all bounce-backs?<\/strong><\/summary>\n<p id=\"htoc-11111111111111111111111111\">While they dramatically improve deliverability to assist in preventing bounce back and spam issues when sending to Gmail, Gmail also checks content and reputation.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Why do my emails land in spam only with Gmail?<\/strong><\/summary>\n<p id=\"htoc-111111111111111111111111111\">Gmail has <a href=\"https:\/\/workspace.google.com\/blog\/identity-and-security\/an-overview-of-gmails-spam-filters\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>stricter filters<\/strong><\/a> than most providers. Test your domain with<strong> <a href=\"https:\/\/gmail.com\/postmaster\/\">Google Postmaster Tools<\/a><\/strong>.&nbsp;<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Do I need all three records: SPF, DKIM, and DMARC?&nbsp;<\/strong><\/summary>\n<p id=\"htoc-1111111111111111111111111111\">Yes, using all three provides the strongest authentication and protection.&nbsp;<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>How often should I review my DNS records?&nbsp;<\/strong><\/summary>\n<p id=\"htoc-11111111111111111111111111111\">At least once a year, or whenever you add new email services.&nbsp;<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Can 1-grid remove my domain from Gmail\u2019s blocklist?&nbsp;<\/strong><\/summary>\n<p id=\"htoc-111111111111111111111111111111\">We can see how we can assist with the investigation, but<strong> <a href=\"https:\/\/support.google.com\/mail\/thread\/204003953\/smtp-gmail-ip-blacklist?hl=en\" target=\"_blank\" rel=\"noreferrer noopener\">Gmail controls its own blocklists<\/a><\/strong>.&nbsp;<\/p>\n<\/details>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-1111111111111111111111111111111\"><strong>Additional Resources&nbsp;<\/strong><\/h2>\n\n\n\n<p><strong><a href=\"https:\/\/1grid.co.za\/knowledge\/resolving-email-error-messages-when-sending-to-gmail-accounts\/\" target=\"_blank\" rel=\"noreferrer noopener\">Resolving Email Error Messages When Sending to Gmail Accounts<\/a>&nbsp;&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/top-10-common-email-issues-and-how-to-resolve-them\/\" target=\"_blank\" rel=\"noreferrer noopener\">Top 10 Common Email Issues and How to Resolve Them<\/a>&nbsp;&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/troubleshooting-steps-for-email\/\" target=\"_blank\" rel=\"noreferrer noopener\">Basic Troubleshooting Steps for Email<\/a> &nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/settings-to-configure-your-1grid-email-accounts-across-devices\/\" target=\"_blank\" rel=\"noreferrer noopener\">Settings to Configure Your 1-grid Email Accounts Across Devices<\/a>&nbsp;&nbsp;&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-enable-dkim-and-spf-on-your-mail-domain\/\" target=\"_blank\" rel=\"noreferrer noopener\">How to Enable DKIM and SPF on Your Mail Domain<\/a>&nbsp;&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/setting-up-email-in-outlook-via-windows-control-panel\/\" target=\"_blank\" rel=\"noreferrer noopener\">Setting Up Email in Outlook via Windows Control Panel<\/a>&nbsp;&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-set-up-email-on-android-for-your-1grid-email-accounts\/\" target=\"_blank\" rel=\"noreferrer noopener\">How to Set Up Email on Android for Your 1-grid Email Accounts<\/a>&nbsp;&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/what-is-email-spoofing\/\" target=\"_blank\" rel=\"noreferrer noopener\">What Is Email Spoofing? How It Works and How to Protect Yourself&nbsp;<\/a>&nbsp;&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-spot-a-scam-email\/\" target=\"_blank\" rel=\"noreferrer noopener\">How to Spot a Scam Email<\/a>&nbsp;&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/?s=email+headers&amp;ht-kb-search=1&amp;lang=\" target=\"_blank\" rel=\"noreferrer noopener\">Email Headers FAQs<\/a>&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/?s=email&amp;ht-kb-search=1&amp;lang=\" target=\"_blank\" rel=\"noreferrer noopener\">Email FAQs<\/a>&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/why-ssl-the-purpose-of-using-ssl-certificates\/\" target=\"_blank\" rel=\"noreferrer noopener\">Why SSL? The Purpose of Using SSL Certificates<\/a> &nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/what-is-a-domain-name-server-dns\/\" target=\"_blank\" rel=\"noreferrer noopener\">What is a Domain Name Server (DNS)?<\/a>&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-update-your-domains-nameservers-at-1-grid\/\" target=\"_blank\" rel=\"noreferrer noopener\">How to Update Your Domain\u2019s Nameservers at 1-grid<\/a>&nbsp; &nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/?s=mailchannels&amp;ht-kb-search=1&amp;lang=\" target=\"_blank\" rel=\"noreferrer noopener\">MailChannels FAQs<\/a>&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/?s=spamtitan&amp;ht-kb-search=1&amp;lang=\" target=\"_blank\" rel=\"noreferrer noopener\">SpamTitan FAQs<\/a>&nbsp;<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-11111111111111111111111111111111\"><strong>Need Additional Support?&nbsp;<\/strong><\/h2>\n\n\n\n<p><strong>We&#8217;re Here to <\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Help<\/strong><\/a><strong>:<\/strong>&nbsp;<\/p>\n\n\n\n<p>Preventing bounce back or spam issues when sending to Gmail doesn\u2019t have to be tricky with this easy-to-reference guide. Stuck? Contact our Support Team for clarity and guidance (<a href=\"https:\/\/1grid.co.za\/contact-us\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>https:\/\/1grid.co.za\/contact-us\/<\/strong><\/a>). We&#8217;re ready to see how we can help!&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gmail and other providers use strict filters to protect users from spam. Unfortunately, even legitimate emails can be flagged or blocked. Most email delivery issues, like bounce back and spam issues, can be avoided with correct authentication, clean sending practices, and proper domain configuration.&nbsp;&nbsp; This guide helps you understand why&#8230;<\/p>\n","protected":false},"author":21,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"ht-kb-category":[1194],"ht-kb-tag":[1413,336,415,431,1235,1412,480,621,766,935],"class_list":["post-31959","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-email-troubleshooting","ht_kb_tag-bounce","ht_kb_tag-email","ht_kb_tag-folder","ht_kb_tag-from","ht_kb_tag-getting","ht_kb_tag-going","ht_kb_tag-how-to","ht_kb_tag-message","ht_kb_tag-prevent","ht_kb_tag-spam"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Preventing Bounce Back or Spam Issues When Sending to Gmail\u00a0 - 1-grid Knowledge Base<\/title>\n<meta name=\"description\" content=\"Learn Gmail-specific fixes and sending best practices to help with preventing bounce back or spam issues when sending to Gmail.\" \/>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Preventing Bounce Back or Spam Issues When Sending to Gmail\u00a0 - 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