Newsletter has too many headers?

  • Resolved vgpmedia

    (@vgpmedia)


    3 years, 7 months ago

    Hi, I’m trying to send a brief newsletter to a relatively small number of subscribers using my Office 365 account but it’s failing before it even sends a single test message. I get the following error:-

    Email Source: Newsletter
    Mailer: Outlook / 365
    InvalidInternetMessageHeaderCollection: Maximum number of headers in one message should be less than or equal to 5.

    How do I get around this? Willing to buy premium version if there’s a fix/add on for Outlook that solves this?

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