[Dovecot] unable to send mails via postfix/dovecot SASL

[Noel Jones]

On Thu, Jun 11, 2009 at 5:02 AM, Michal Szymanski<msz at astrouw.edu.pl> wrote:
> Now when I try to send a mail from my home PC, using Thuinderbird
> 2.0.0.21, with SSL connection configured for outgoing smtp server (port
> 465), using username/password, it shows "Connected to server..." message
> but after a minute or so, it fails saying that the connection to SMTP
> server failed.
>
> The server log shows:
> 11:51:24 sirius postfix/smtpd[15126]: connect from my_home_pc_name/ip
> Jun 11 11:52:25 sirius postfix/smtpd[15126]: lost connection after
>    UNKNOWN from from my_home_pc_name/ip
> Jun 11 11:52:25 sirius postfix/smtpd[15126]: disconnect from my_home_pc_name/ip

This looks as if you didn't enable SSL wrappermode in postfix's
master.cf for port 465.

In postfix master.cf, make sure the section for port 465/smtps contains
  -o smtpd_tls_wrappermode=yes


With a modern email client like TBird, it's generally preferred to use
STARTTLS (that's the TLS button in TBird) on the "submission" port
587.

  -- Noel Jones