> If you do find a solution to the SMTP-hijacking problem, please let me know. > Currently, I have mine set to refuse connections from outside my local > subnet, but that's not great for when I'm using my Android mobile on the go, > and want to reply to an email. Is there something we can do with > public/private keys here? Just a thought.
Isn't it solved by SMTP-AUTH? Postfix can use Dovecot SASL for authentication. My server accepts relay only on 587 (requires STARTTLS and authentication), I don't see many failures in the logs (unlike zombies trying to relay on port 25).
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