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Re: Mail authentication error?

> Gordon Messmer wrote:
>> Hongwei Li wrote:
>>> Recently, users say that they cannot use Outlook to send emails out if
>>> they
>>> set SSL connection with port 587 for outgoing server and 993 for incoming
>>> server.
>> Port 587 isn't an "SSL" port.  It's the MSA port, and probably supports
>> TLS.  If Outlook is configured to do SSL rather than TLS, it's not going
>> to work.
>> Port 465 is the SMTP "SSL" port.
> In my experience Outlook is much happier doing submission using port 465
> rather than 587.
> I turn on port 465 as follows in sendmail.mc:
> DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
> Then configure the Outlook clients to use port 465 instead of 587.
> Paul.

I use port 587 based on the words in sendmail.mc:

dnl # The following causes sendmail to additionally listen to port 465, but
dnl # starting immediately in TLS mode upon connecting. Port 25 or 587 followed
dnl # by STARTTLS is preferred, but roaming clients using Outlook Express can't
dnl # do STARTTLS on ports other than 25. Mozilla Mail can ONLY use STARTTLS
dnl # and doesn't support the deprecated smtps; Evolution <1.1.1 uses smtps
dnl # when SSL is enabled-- STARTTLS support is available in version 1.1.1.

I checked more of my users, it looks that most of them are working (port 587
with ssl setting in OL).  I will test 465 and hope it is better.

BTW, it seems that Outlook Express always shows problems with SSL settings.
Any experiences with it of making it working with SSL?



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