> On Feb 2, 2018, at 12:39 AM, Olivier <olivier.nic...@cs.ait.ac.th> wrote:
>
>> You've also not explained what you mean by deleting and recreating the
>> account.
>
> I am not a Mac user, but from the Mail app, select Files/Account and
> remove the account that makes problem and recreate it the same.
Right, so this is a client-side change, which helps the Mac forget
whatever wrong settings it had before. Perhaps an incorrect SASL
setting, or an incorrect port number.
>> The only random guess that comes to mind is your SASL library may now
>> claims to support OAUTH, but really does not. Apple's Mail.app tends
>> to be fond of that particular SASL mechanism. Of course without logs
>> that's just crazy wild speculation.
>
> Thank you,
>
> Olivier
>
> A failing connection:AMTP authentication:
> Jan 29 16:44:57 fbsd63 postfix/smtpd[93113]: connect from
> unknown[118.174.201.202]
> Jan 29 16:44:57 fbsd63 postfix/smtpd[93113]: Anonymous TLS connection
> established from unknown[118.174.201.202]: TLSv1.2 with cipher
> ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
> Jan 29 16:44:59 fbsd63 postfix/smtpd[93113]: warning:
> unknown[118.174.201.202]: SASL PLAIN authentication failed:
> Jan 29 16:45:05 fbsd63 postfix/smtpd[93113]: warning:
> unknown[118.174.201.202]: SASL PLAIN authentication failed:
> Jan 29 16:45:11 fbsd63 postfix/smtpd[93113]: warning:
> unknown[118.174.201.202]: SASL PLAIN authentication failed:
> Jan 29 16:45:21 fbsd63 postfix/smtpd[93113]: warning:
> unknown[118.174.201.202]: SASL PLAIN authentication failed: Connection lost
> to authentication server
> Jan 29 16:45:21 fbsd63 postfix/smtpd[93113]: disconnect from
> unknown[118.174.201.202] ehlo=2 starttls=1 auth=0/4 quit=1 commands=4/8
Is this the submission service on port 587, or inbound mail on
port 25?
> A successful SMTP authentication with same credentionls but from a
> different Mac:
>
> Jan 30 17:52:38 fbsd63 postfix/smtpd[15674]: connect from
> Mac-4.desktops.cs.ait.ac.th[192.41.170.243]
> Jan 30 17:52:38 fbsd63 postfix/smtpd[15674]: Anonymous TLS connection
> established from mac-4.desktops.cs.ait.ac.th[192.41.170.243]: TLSv1.2 with
> cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
Ditto, and you don't show the rest of the session, where's see an actual login
mechanism...
--
Viktor.
