[Dovecot] Sending email using IMAP

Marc Perkel marc at perkel.com
Fri Nov 3 19:01:21 UTC 2006

William Astle wrote:
> Marc Perkel wrote:
>> IMAP requires a password. SMTP it's optional. I think that consumer SMTP
>> should be replaced with not only something that requires a password, but
>> that the user has to log into the account that they are sending email
>> from. SMTP doesn't have to be tied to IMAP accounts. If you have an SMTP
>> account you can spoof anyone. My idea with IMAP sending is to deny the
>> ability of the sender to use a different email address that the one that
>> they are logged into. This is to prevent spam and spoofing.
> I don't know what SMTP software you're using, but on my servers port 587
> *requires* authentication and port 25 requires authentication in order
> to relay mail. Of course, once authenticated, you can put anything you
> want for sender address but that, too, can be prevented with a
> reasonable MTA and correct configuration.
> Basically, my point is that you can configure your SMTP server to
> enforce whatever restrictions you want on the envelope or even the
> headers. Just because you can configure it to be an open relay doesn't
> mean you have to have it configured that way.
It does on mine as well. But I do not control the rest of the world. If 
everyone used this standard then spam would drop drastically.

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