Title: Invalid MSGID Last modified: July 13, 2021 --- # Invalid MSGID * [domzy7](https://wordpress.org/support/users/domzy7/) * (@domzy7) * [4 years, 10 months ago](https://wordpress.org/support/topic/invalid-msgid/) * Hello, * I am using POST SMTP and Sendgrid and for some reason my emails are having multiple msg ids included and showing as invalid msg id on mail tester * ``` Delivered-To: redacted Received: by 2002:a05:7108:3602:0:0:0:0 with SMTP id g2csp3115586gdd; Tue, 13 Jul 2021 04:04:30 -0700 (PDT) X-Received: by 2002:a9d:5c7:: with SMTP id 65mr3224791otd.360.1626174270290; Tue, 13 Jul 2021 04:04:30 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1626174270; cv=none; d=google.com; s=arc-20160816; b=piHwu3EBScZ3UR51r6tfbNVesJu/PGwWmemq3B4uUjoh+ekiaS0WLo94JZCBLmHadx KEKQBGb6uk1fIkl++2G2tD9D41AdK8euAvB7a9nEfjO+oI0BP0Oz7V9DXJWzxslwIoZO a0FzMjDSJ5xeg0Ex+dr9C4z07OEFxrssxQtzMVlOcyT4wIhga5zQS2bxOl4rP7pXA3tc Be9sFwF77DR0betGi4MnIGf0+9zD2DxfARrvD7AJCyPpEqCIxPaQ6IkwbO7eLNModtWi yBFA9UriyE9P4wfEd/xgtxnM4pTbvp4emybI3y9zJ3n2DABjJ5fkwqoZ/ueb+vcB9xY5 6w5g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=to:subject:message-id:date:from:mime-version:dkim-signature; bh=vl43TTTbxhm5vqXR/T88LoWrPXaPS5X1xoT7XaM5EXo=; b=rmnfuD92poYRYafPnGvB6liDzo9akIgWmh5rlRy6zqt/pLiRf2957E/pYmJFWG5+52 CkudUVZgKTOGcbV6Qim4suNLk1+O5f7UdScbsfWTPaCJE5lO6wxpe3m21vxenNnJfAI5 vhalNyAjon3X9dSEs5nVfpFrELLTQWpA1CXdeuxgGAITBiEXcW+wUFN/XqH4KjSQH9or ifEDu5rT0gApWw72dPDSP7xeyhKJFA072wloAYmh0VsgPz+qcYSJYqEecS5cnHlxlnJ9 0xx+JL3t0U6ynteRxzHNBa2sSyEGvoxI6YiH1YqLEYL5SZ39UrnHx6MKae8Fi0mOFA0+ pEBw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@vikingspore.co.uk header.s=google header.b=HvupDt5j; spf=pass (google.com: domain of info@vikingspore.co.uk designates 209.85.220.41 as permitted sender) smtp.mailfrom=info@vikingspore.co.uk Return-Path: Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id c7sor297671otf.120.2021.07.13.04.04.30 for (Google Transport Security); Tue, 13 Jul 2021 04:04:30 -0700 (PDT) Received-SPF: pass (google.com: domain of info@vikingspore.co.uk designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@vikingspore.co.uk header.s=google header.b=HvupDt5j; spf=pass (google.com: domain of info@vikingspore.co.uk designates 209.85.220.41 as permitted sender) smtp.mailfrom=info@vikingspore.co.uk DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vikingspore.co.uk; s=google; h=mime-version:from:date:message-id:subject:to; bh=vl43TTTbxhm5vqXR/T88LoWrPXaPS5X1xoT7XaM5EXo=; b=HvupDt5jkne+EG418v10BEZa9RUNevFXdAD8YLEyq45GRm1xAcN9XlsXhjuJD8vj6U 1f2VFd8kVOk0QqzAQNH/Z8aI1nQHiXQWYpJJudcx2Vp5wQ1IkQEaa6aA3DQEXBmUqs9b hjYrryytw73WNgvirNh6KaIE5POCAbshUFTxYJN2dPN5qbfHZpfhx48rjaEOTnyhchkS Qm+WTL5a3fa39t0DXCioT82l43DqNGf/2G9W0H/RQ8+9m5t9DHbxpajET0Xik/WNuoEA NbNO9S5iPTujBICRoNUIIcIqcljWqBfu5KnjgctcTlNIekSB38YLsXLkyyie7WaLJ6Ow kz+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=vl43TTTbxhm5vqXR/T88LoWrPXaPS5X1xoT7XaM5EXo=; b=ga6gAgNAwUJafHNdoQDTtq6LQG0tBHqZ+jxVBa0qA0KCb5BWblLT2WQGJLxVqTRB+i efMPTc7+ZjuxHd6ibUvu2rbuRoFMJ6SYdNvhWa6GSEaGnEj2YOeBzxz0Mqr2evXFK4/K PmLjG3sAMdoa5epLlaineUME9NnHmRwtwDh5+FkI2q7c4ff+oGBaobZ2p6TJQOxLG+FN VtTvCrgwZtKnPbEugHtK2ymp1LeLUAYOYxmCVoLV5fH/OfgztHr+exGxXs4+BZ8Xqmoa rXRCrr4Op9fER6QezjeecB8y11YrNa8HXsRbAlvX+glytUD+E41Kgz8nVDJ4MUXRIpVO 5IiQ== X-Gm-Message-State: AOAM5332isjF52Ov/k6gqQrEUfll8mnc+ivwvGnt6Hlspz1+2iEdREr/ 4ltvB/Nau4E1ukxU3zPtEwcxilRHMR+zWuz/UPb5Gd8R9vFExg== X-Google-Smtp-Source: ABdhPJxhjLyMuKEddMS3FpzyZX1VmoKudWoVjS7cN98T+NnhsKf64sktyayGLxmDf06Z/q6TlAPlKCXI+cCBMVcIFjw= X-Received: by 2002:a9d:5916:: with SMTP id t22mr3123393oth.269.1626174269942; Tue, 13 Jul 2021 04:04:29 -0700 (PDT) MIME-Version: 1.0 From: Viking Spores Date: Tue, 13 Jul 2021 12:04:19 +0100 Message-ID: ``` * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Finvalid-msgid%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 4 replies - 1 through 4 (of 4 total) * [Tim](https://wordpress.org/support/users/tneville/) * (@tneville) * [4 years, 10 months ago](https://wordpress.org/support/topic/invalid-msgid/#post-14657679) * Hi [@domzy7](https://wordpress.org/support/users/domzy7/), * Flagging to developer for comment. Unfortunately I am unable to advise when a reply may be possible, as the developer is very busy. Sorry! * Kind Regards, Tim * [Tim](https://wordpress.org/support/users/tneville/) * (@tneville) * [4 years, 10 months ago](https://wordpress.org/support/topic/invalid-msgid/#post-14657681) * [@yehudah](https://wordpress.org/support/users/yehudah/) – message ID issue * Thread Starter [domzy7](https://wordpress.org/support/users/domzy7/) * (@domzy7) * [4 years, 10 months ago](https://wordpress.org/support/topic/invalid-msgid/#post-14671322) * Issue fixed: * During a deliverable test, I noticed that I was getting the error INVALID_MSGID Message-Id is not valid, according to RFC 2822for emails sent using SMTP Mail Mailer / Email Login + SendGrid API. This was actually lowering SpamAssassin’s score, which led to the email being considered spam. * The problem seems to be that the Message-IDangle brackets are missing from the header around its value, eg. Message-ID: [abc@def.com](https://wordpress.org/support/topic/invalid-msgid/abc@def.com?output_format=md) instead of Message-ID: . Once I created the tiny array below, I stopped getting the error. * /Postman/PostmanWpMail.php line 87: * – return $id . ‘@’ . str_replace(‘www.’, ”, $hostName); + return ‘<‘ . $id .‘ @’ . str_replace(‘www.’, ”, $hostName) . ‘>’;` - This reply was modified 4 years, 10 months ago by [domzy7](https://wordpress.org/support/users/domzy7/). * [mpskovvang](https://wordpress.org/support/users/mpskovvang/) * (@mpskovvang) * [4 years, 10 months ago](https://wordpress.org/support/topic/invalid-msgid/#post-14731830) * Hello * Our SpamAssassin score is also negatively affected by the Message-ID header not following the RFC 2822. * I’ll donate a $50 bounty if this issue can be resolved within the next week. * Thanks, Martin. Viewing 4 replies - 1 through 4 (of 4 total) The topic ‘Invalid MSGID’ is closed to new replies. * ![](https://ps.w.org/post-smtp/assets/icon-128x128.gif?rev=3209655) * [Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App](https://wordpress.org/plugins/post-smtp/) * [Frequently Asked Questions](https://wordpress.org/plugins/post-smtp/#faq) * [Support Threads](https://wordpress.org/support/plugin/post-smtp/) * [Active Topics](https://wordpress.org/support/plugin/post-smtp/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/post-smtp/unresolved/) * [Reviews](https://wordpress.org/support/plugin/post-smtp/reviews/) * 4 replies * 3 participants * Last reply from: [mpskovvang](https://wordpress.org/support/users/mpskovvang/) * Last activity: [4 years, 10 months ago](https://wordpress.org/support/topic/invalid-msgid/#post-14731830) * Status: not resolved