How to fix 421 4.7.1 DYN:T1 postmaster AOL error message

Discussion in 'Mail Server Support' started by popowich, May 25, 2013.

  1. popowich

    popowich EQ Forum Admin Staff Member

    Aug 12, 2008
    Likes Received:

    It appears that your email has been blocked because it's being sent directly from a residential & dynamically assigned IP address.

    If you are paying for business class service and a static IP address contact your ISP to get this problem corrected.

    If you are running a mail server at home try one of these solutions:

    • Configure your mail server to relay all email through your ISP's SMTP relays
    • You could configure your mail server to smarthost only email that's being blocked through your ISP's SMTP relays
    • Purchase a 3rd party SMTP relay service that you can use to relay your email

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