Message-ID invalid

  • Hello,

    I am using Post SMTP for quite some time now and I love it. Recently I switched to Sendgrid API and tested my outgoing mails.

    I get this message by Spamassassin:
    “INVALID_MSGID Message-Id is not valid, according to RFC 2822”

    From: LYONE <[email protected]>
    Mime-Version: 1.0
    Message-ID: [email protected]
    Subject: Postman SMTP Test (lyone.co)

    I use the latest version of Post SMTP.

    Can you help me fix this issue?

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