> On Jul 31, 2017, at 1:17 PM, [email protected] wrote:
>
> Jul 23 06:22:21 maryland postfix/handoff/smtpd[7668]: connect from
> smtp10.ymem.net[24.73.102.76]
> Jul 23 06:22:22 maryland postfix/handoff/smtpd[7668]: disconnect from
> smtp10.ymem.net[24.73.102.76] ehlo=1 mail=0/1 quit=1 commands=2/3
The client sent:
EHLO -- which your server accepted
MAIL FROM: -- -"- rejected
QUIT -- -"- accepted
Find out why you're rejecting the client's "MAIL FROM:" command.
This would typically be logged, but you can also use tcpdump to
record the SMTP session and look there as a last resort.
TCP buffer sizes are unlikely to be relevant here.
--
Viktor.
