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Re: Why do so few mail providers support Port 587?
On Wed, 16 Feb 2005 01:46:09 PST, Owen DeLong said: > > --==========04787AC3A7FDFBF67AA5========== > Content-Type: text/plain; charset=us-ascii; format=flowed > Content-Transfer-Encoding: quoted-printable > Content-Disposition: inline > > Um, you actually have to work somewhat to get sendmail to support > unauthenticated submission on port 587. The default configuration > is that port 25 is unauthenticated (albeit with some restrictions > on relaying (only for local clients)) and port 587 is authenticated. > > As such, I'm not sure why you seem to think that sendmail on port 587 > is unauthenticated. Umm.. because the Sendmail 8.13.3 tree has this: (from cf/README): ---- If DAEMON_OPTIONS is not used, then the default is DAEMON_OPTIONS(`Port=smtp, Name=MTA') DAEMON_OPTIONS(`Port=587, Name=MSA, M=E') ---- from doc/op/op.me: That is, one way to specify a message submission agent (MSA) that always requires authentication is: .(b O DaemonPortOptions=Name=MSA, Port=587, M=Ea .)b Hmm.. no default 'a' to require authentication by default. That would probably explain why you actually have to work to set it up.