Peter Micunek wrote:
Hi,
I have a strange problem with some email sessions.
Postfix 2.5.2 is configured like email router.
It receives emails from many sources and sends them to one destination.
Each rules for mail routing are done by transport table.
Everything works properly but sometimes some emails are "bounced".
Could you help me to find where the problem is.
LOG:
Jan 23 08:05:42 aaa.bbb.sk postfix/smtp[28591]: 08ECEA73CD:
to=<b...@ccc.ddd.sk>, relay=eeeeee.sk[10.10.10.101]:25,
conn_use=2, delay=10, delays=10/0.03/0/0, dsn=5.0.0, status=bounced
(host eeeeee.sk[10.10.10.101] said: 501 The first command in a
session must be the HELO command (in reply to MAIL FROM command))
SESSION:
(C - postfix)
(S - propietary SMTPD)
C ---> HELO aaa.bbb.sk
S <--- 250 Hello ccc.ddd.sk
C ---> MAIL FROM:<sm...@eeeeee.sk>
S <--- 250 <sm...@eeeeee.sk> Sender ok
C ---> RCPT TO:<b...@ccc.ddd.sk>
S <--- 250 <b...@ccc.ddd.sk> Recipient ok
C ---> DATA
S <--- 354 Start mail input; end with <CRLF>.<CRLF>
C ---> .
S <--- 250 Message accepted for delivery
C ---> RSET
S <--- 250 Reset state
C ---> MAIL FROM:<j...@xxxxxx.sk>
S <--- 501 The first command in a session must be the HELO command
BR
Peter
The "S" server doesn't speak SMTP.
You can work around this error by setting in postfix main.cf
smtp_connection_cache_on_demand = no
--
Noel Jones
