554 5.1.0 Sender denied

Discussion in 'Mail Server Support' started by popowich, Feb 8, 2012.

  1. popowich

    popowich EQ Forum Admin Staff Member

    Aug 12, 2008
    Likes Received:

    Did you get the error 554 5.1.0 Sender denied ?

    The block could have happened for a variety of reasons including :

    • Email sent From: an invalid domain name
    • The email address is blocked
    • The entire domain portion of the email address is blocked
    • The IP address is blocked
    • The IP address is listed in an RBL
    To resolve the problem try contacting support at the destination to find out why the email was denied.

    If that's not possible you can try to figure it out by checking your IP address for blacklistings.

Want to reply or ask your own question?

It only takes a minute to sign up (and it's free!). Click the orange sign up button to choose a username and then you can ask your own questions on the forum.