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Mail gets rejected: This mail server requires authentication.

Discussion in 'E-mail Discussion' started by mitch2k, Dec 5, 2010.

  1. mitch2k

    mitch2k Member

    Dec 5, 2010
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    I have a problem sending mail to 1 specific domain on my new cPanel/WHM VPS with Exim mailserver from my external hosted Exchange account. Sending mails to every other e-mail domain on my VPS works fine, only to that specific domain fails.
    But when I use an non-exchange email account to send to that domain, it works perfect.

    This is the info in the rejection mail:

    I think the Exim mailserver rejects the mail, because the sending mailserver domain ( is not the same as my e-mail account (, but in the mail logs on my server I can’t find any notice of the exchange server that connects, or that any mail gets rejected.

    I tried adding the IP of tot the Trusted SMTP IPs and to the /etc/relayhosts, and I tried disabeling some of the ACL Options, but still I get the rejection notice.

    So it looks like the problem is the connection from the exchange server to my mailserver.

    Anyone has an idea why the mail gets rejected?

    Thank you!

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