> On Apr 21, 2018, at 2:06 PM, David Mehler <dave.meh...@gmail.com> wrote:
>
> Thanks. I'm sorry I should probably have more completely clarified
> that. Different client entirely, the previous message I was attempting
> autoconfig with Thunderbird and getting those errors.
>
> This time I'm trying outlook 2010 with autodiscover and getting the
> errors in my last message. I thought to keep it under the same thread.
>
> For completeness and because I probably confused everyone, here's an
> outlook 2010 attempted connection and my current main.cf and master.cf
> files.
>
> Apr 21 13:52:54 hostname postfix/submission/smtpd[74637]: connect from
> Connecting-Host-And-IP
> Apr 21 13:52:54 hostname postfix/submission/smtpd[74637]: lost
> connection after UNKNOWN from Connecting-Host-And-IP
> Apr 21 13:52:54 hostname postfix/submission/smtpd[74637]: disconnect
> from Connecting-Host-And-IP unknown=0/1 commands=0/1
You've probably configured Outlook to do (implicit) SSL on port 587,
rather than STARTTLS. You should either direct its connections to
port 465 with "wrapper mode TLS", or configure it to do STARTTLS on
587.
--
Viktor.
