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Enforce SSL

Hi!

Is it possible to enforce encrypted authentication for SMTP? Our users use Sophos UTM 9.305-4 to send E-Mails via SMTP - and we don't want them to be able to use plaintext authentication.

Thanks, Mike


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  • I'm sorry, i can't find anything solving my problem there. The SMTP -> Encryption section seems to be entirely concerned with E-Mail encryption.

    I don't want to encrypt E-Mails, I want users that authenticate with their credentials against the SMTP Proxy to be forced to use SSL.
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