I installed Postfix with Postfixadmin some weeks ago. I've been able to solve most of issues I met (several errors from receiving servers) but there is something I cannot understand yet. This is what I get from a receiving SMTP server: Code: Jun 23 09:57:43 node1 postfix/smtp[3950]: send attr reason = host mail.domain.it[abc.abc.abc.abc] refused to talk to me: 550 Jun 23 09:57:43 node1 postfix/smtp[3950]: 418E098004C2: to=<[email protected]>, relay=mail.domain.it[abc.abc.abc.abc]: 25, delay=80211, delays=80211/0.03/0.45/0, dsn=4.0.0, status=deferred (host mail.domain.it[abc.abc.abc.abc] refused to talk to me: 550 ) I also tried: Code: # telnet mail.domain.it 25 Trying abc.abc.abc.abc... Connected to mail.domain.it (abc.abc.abc.abc). Escape character is '^]'. 550 Connection closed by foreign host. What's that? A sort of blacklist? UPDATE I checked my IP at http://mxtoolbox.com/blacklists.aspx but it seems it's not blacklisted at all... :-(
There might be some other blacklist where your server is on. Is your server hosted on a dynamic IP address?
No, the server is connected to a public IP address, it's not open relay, the SPF check is passed, the DNS reverse lookup is ok. I have another case when sending mail to one of the biggest italian provider. The log is long but it's the only way to understand: Code: Jun 24 17:15:30 mail postfix/smtp[12774]: smtp_parse_destination: telecomitalia.it smtp Jun 24 17:15:30 mail postfix/smtp[12774]: connecting to telecomitalia.it port 25 Jun 24 17:15:30 mail postfix/smtp[12774]: dns_query: telecomitalia.it (MX): OK Jun 24 17:15:30 mail postfix/smtp[12774]: dns_get_answer: type MX for telecomitalia.it Jun 24 17:15:30 mail postfix/smtp[12774]: smtp_addr_one: host mx4.telecomitalia.it Jun 24 17:15:30 mail postfix/smtp[12774]: lookup mx4.telecomitalia.it type A flags 128 Jun 24 17:15:30 mail postfix/smtp[12774]: dns_query: mx4.telecomitalia.it (A): OK Jun 24 17:15:30 mail postfix/smtp[12774]: dns_get_answer: type A for mx4.telecomitalia.it Jun 24 17:15:30 mail postfix/smtp[12774]: lookup mx4.telecomitalia.it type AAAA flags 128 Jun 24 17:15:55 mail postfix/smtp[12774]: dns_query: mx4.telecomitalia.it (AAAA): Host found but no data record of requested type Jun 24 17:15:55 mail postfix/smtp[12774]: smtp_addr_one: host mx5.telecomitalia.it Jun 24 17:15:55 mail postfix/smtp[12774]: lookup mx5.telecomitalia.it type A flags 128 Jun 24 17:15:55 mail postfix/smtp[12774]: dns_query: mx5.telecomitalia.it (A): OK Jun 24 17:15:55 mail postfix/smtp[12774]: dns_get_answer: type A for mx5.telecomitalia.it Jun 24 17:15:55 mail postfix/smtp[12774]: lookup mx5.telecomitalia.it type AAAA flags 128 Jun 24 17:16:06 mail postfix/smtp[12774]: dns_query: mx5.telecomitalia.it (AAAA): Host found but no data record of requested type Jun 24 17:16:06 mail postfix/smtp[12774]: smtp_addr_one: host mx6.telecomitalia.it Jun 24 17:16:06 mail postfix/smtp[12774]: lookup mx6.telecomitalia.it type A flags 128 Jun 24 17:16:06 mail postfix/smtp[12774]: dns_query: mx6.telecomitalia.it (A): OK Jun 24 17:16:06 mail postfix/smtp[12774]: dns_get_answer: type A for mx6.telecomitalia.it Jun 24 17:16:06 mail postfix/smtp[12774]: lookup mx6.telecomitalia.it type AAAA flags 128 Jun 24 17:16:16 mail postfix/smtp[12774]: dns_query: mx6.telecomitalia.it (AAAA): Host found but no data record of requested type Jun 24 17:16:16 mail postfix/smtp[12774]: smtp_addr_one: host mx2.telecomitalia.it Jun 24 17:16:16 mail postfix/smtp[12774]: lookup mx2.telecomitalia.it type A flags 128 Jun 24 17:16:16 mail postfix/smtp[12774]: dns_query: mx2.telecomitalia.it (A): OK Jun 24 17:16:16 mail postfix/smtp[12774]: dns_get_answer: type A for mx2.telecomitalia.it Jun 24 17:16:16 mail postfix/smtp[12774]: lookup mx2.telecomitalia.it type AAAA flags 128 Jun 24 17:16:16 mail postfix/smtp[12774]: dns_query: mx2.telecomitalia.it (AAAA): Host found but no data record of requested type Jun 24 17:16:16 mail postfix/smtp[12774]: smtp_addr_one: host mx3.telecomitalia.it Jun 24 17:16:16 mail postfix/smtp[12774]: lookup mx3.telecomitalia.it type A flags 128 Jun 24 17:16:16 mail postfix/smtp[12774]: dns_query: mx3.telecomitalia.it (A): OK Jun 24 17:16:16 mail postfix/smtp[12774]: dns_get_answer: type A for mx3.telecomitalia.it Jun 24 17:16:16 mail postfix/smtp[12774]: lookup mx3.telecomitalia.it type AAAA flags 128 Jun 24 17:16:16 mail postfix/smtp[12774]: dns_query: mx3.telecomitalia.it (AAAA): Host found but no data record of requested type Jun 24 17:16:16 mail postfix/smtp[12774]: smtp_addr_one: host mx1.telecomitalia.it Jun 24 17:16:16 mail postfix/smtp[12774]: lookup mx1.telecomitalia.it type A flags 128 Jun 24 17:16:16 mail postfix/smtp[12774]: dns_query: mx1.telecomitalia.it (A): OK Jun 24 17:16:16 mail postfix/smtp[12774]: dns_get_answer: type A for mx1.telecomitalia.it Jun 24 17:16:16 mail postfix/smtp[12774]: lookup mx1.telecomitalia.it type AAAA flags 128 Jun 24 17:16:17 mail postfix/smtp[12774]: dns_query: mx1.telecomitalia.it (AAAA): Host found but no data record of requested type Jun 24 17:16:17 mail postfix/smtp[12774]: begin telecomitalia.it address list Jun 24 17:16:17 mail postfix/smtp[12774]: pref 10 host mx4.telecomitalia.it/217.169.121.15 Jun 24 17:16:17 mail postfix/smtp[12774]: pref 10 host mx5.telecomitalia.it/217.169.121.66 Jun 24 17:16:17 mail postfix/smtp[12774]: pref 10 host mx6.telecomitalia.it/217.169.121.66 Jun 24 17:16:17 mail postfix/smtp[12774]: pref 20 host mx2.telecomitalia.it/156.54.233.161 Jun 24 17:16:17 mail postfix/smtp[12774]: pref 20 host mx3.telecomitalia.it/156.54.233.162 Jun 24 17:16:17 mail postfix/smtp[12774]: pref 20 host mx1.telecomitalia.it/156.54.233.160 Jun 24 17:16:17 mail postfix/smtp[12774]: end telecomitalia.it address list Jun 24 17:16:17 mail postfix/smtp[12774]: smtp_connect_addr: trying: mx6.telecomitalia.it[217.169.121.66] port 25... Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 220 mx6.telecomitalia.it Wed, 24 Jun 2009 17:16:17 +0200 Jun 24 17:16:17 mail postfix/smtp[12774]: > mx6.telecomitalia.it[217.169.121.66]:25: EHLO mail.mydomain.it Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-mx6.telecomitalia.it Hello [my.ip.addr] Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-TURN Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-SIZE 20480000 Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-ETRN Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-PIPELINING Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-DSN Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-ENHANCEDSTATUSCODES Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-8bitmime Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-BINARYMIME Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-CHUNKING Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-VRFY Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-X-LINK2STATE Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250-XEXCH50 Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250 OK Jun 24 17:16:17 mail postfix/smtp[12774]: > mx6.telecomitalia.it[217.169.121.66]:25: MAIL FROM:<john.doe@first_virtual_domain.it> SIZE=5826 BODY=7BIT Jun 24 17:16:17 mail postfix/smtp[12774]: > mx6.telecomitalia.it[217.169.121.66]:25: RCPT TO:<[email protected]> ORCPT=rfc822;[email protected] Jun 24 17:16:17 mail postfix/smtp[12774]: > mx6.telecomitalia.it[217.169.121.66]:25: DATA Jun 24 17:16:17 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250 2.1.0 john.doe@first_virtual_domain.it....Sender OK Jun 24 17:16:18 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250 2.1.5 [email protected] Jun 24 17:16:18 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 354 Start mail input; end with <CRLF>.<CRLF> Jun 24 17:16:18 mail postfix/smtp[12774]: > mx6.telecomitalia.it[217.169.121.66]:25: . Jun 24 17:16:18 mail postfix/smtp[12774]: > mx6.telecomitalia.it[217.169.121.66]:25: QUIT Jun 24 17:16:19 mail postfix/smtp[12774]: < mx6.telecomitalia.it[217.169.121.66]:25: 250 2.6.0 <1F71AE495A4C45979BC8B510A2EC7ECA@MYPC> Queued mail for delivery Jun 24 17:16:19 mail postfix/smtp[12774]: F37FB98004FC: to=<[email protected]>, relay=mx6.telecomitalia.it[217.169.121.66]:25, delay=50, delays=0.01/0.02/48/1.8, dsn=2.6.0, status=sent (250 2.6.0 <1F71AE495A4C45979BC8B510A2EC7ECA@MYPC> Queued mail for delivery) It seems that after parsing all smtp servers from MX records Postfix is able to send the email. I get no errors. But the mail never arrives!!!
