Hi I have some problem in send My working environment is:
---postfix1-(MX)----lmtp-dovecot-director---------------dovecot1-6 In dovecot1-6 i have exim whose smarthost is postfix2 name (P5) all works fine but sometimes I get in log: Oct 6 14:14:25 P5 postfix/smtp[52636]: 4HPY3L22S1z3mgPD: conversation with mail3.allegromail.pl[178.21.155.20] timed out while receiving the initial server greeting Oct 6 14:14:30 P5 postfix/smtp[52636]: 4HPY3L22S1z3mgPD: conversation with mail1.allegromail.pl[178.21.155.19] timed out while receiving the initial server greeting Oct 6 14:14:35 P5 postfix/smtp[52636]: 4HPY3L22S1z3mgPD: conversation with mail4.allegromail.pl[193.203.222.20] timed out while receiving the initial server greeting Oct 6 14:14:40 P5 postfix/smtp[52636]: 4HPY3L22S1z3mgPD: to=<g4pmzis...@allegromail.pl>, relay=mail2.allegromail.pl[193.203.222.19]:25, delay=755, delays=734/0/20/0, dsn=4.4.2, status=deferred (conversation with mail2.allegromail.pl[193.203.222.19] timed out while receiving the initial server greeting) When I try use telnet root@P5:~# telnet mail4.allegromail.pl 25 Trying 193.203.222.20... Connected to mail4.allegromail.pl. Escape character is '^]'. 220 mail4.allegromail.pl ESMTP mail4.allegromail.pl I understand that maybe something (postscreen?)is on the recipient's side - but I do not know how to verify if everything is ok on my site --