* Ralf Hildebrandt <ralf.hildebra...@charite.de>: > * Richard Smits <r.sm...@tudelft.nl>: > > Hello, > > > > We have a problem in SMTP communication with some external > > mailservers. I will explain. > > If i do a telnet to port 25 on a remote server, I get no greeting > > message, it just waits. I suppose this is some greeting delay for > > anti spam. > > It comes after 40s!
So, I tried sending mail there and it worked on the first try: Feb 23 11:54:31 mail postfix/cleanup[23074]: 095F81C362D: warning: header Subject: Test postmas...@ujf.cas.cz from local; from=<...@charite.de> to=<postmas...@ujf.cas.cz> Feb 23 11:55:09 mail postfix/smtp[18516]: setting up TLS connection to mx.ujf.cas.cz[147.231.100.6]:25 Feb 23 11:55:09 mail postfix/smtp[18516]: certificate verification failed for mx.ujf.cas.cz[147.231.100.6]:25: untrusted issuer /C=CZ/ST=Czech Republic/L=Rez/O=UJF AVCR/OU=ITU/CN=UJF AVCR Root CA/emailAddress=i...@ujf.cas.cz Feb 23 11:55:09 mail postfix/smtp[18516]: Untrusted TLS connection established to mx.ujf.cas.cz[147.231.100.6]:25: TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits) Feb 23 11:55:09 mail postfix/smtp[18516]: 095F81C362D: to=<postmas...@ujf.cas.cz>, relay=mx.ujf.cas.cz[147.231.100.6]:25, delay=38, delays=0/0/38/0.05, dsn=4.7.1, status=deferred (host mx.ujf.cas.cz[147.231.100.6] said: 451 4.7.1 Greylisting in action, please come back later (in reply to RCPT TO command)) -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebra...@charite.de | http://www.charite.de
