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Authenticated relay in MTA mode

AntonioPallua

Hi, I've configured XG SFOS v16 in MTA mode (mail server in DMZ).

It works except for authenticated relay:

I need to permit authenticated relay for users outside my office (imap/smtp form mobile device), pop3/imap works, smtp doesn't.

The mail client gives me the error 451 invalid HELO/EHLO or missing  RDNS when I try to send an email.

If i disable "Reject invalid HELO or missing RDNS" in the XG, then the error is: Authentication methods are not supported by the server (more or less, the error is in italian).

Can Anyone give me an hint?

 

Thank you

--Antonio



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  • 0 in reply to Aditya Patel

    Hi Patel thank you for the answer, but the link is about UTM, this is XG.

    The RDNS is Ok, I tested with various internet email checker; also email from internal server to internet and vice versa are ok.
    I have the problem only when I try to send emails with an email client outside the office (ie: iphone on on mobile network).

    Unfortunately I cannot find documentation on MTA feature.

    --Antonio

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