Re: postfix/smtp Connection timeout
Thanks. That was the problem Leo On 4/6/19 10:53 pm, Bill Cole wrote: On 4 Jun 2019, at 8:23, subscription1 wrote: telnet on the working server shoews --- >>> telnet 203.205.219.57 25 Trying 203.205.219.57... Connected to 203.205.219.57. Escape character is '^]'. 220 newxmmxsza20.qq.com MX QQ Mail Server. ^] telnet> On the failing server I get --- >>> telnet 203.205.219.57 25 Trying 203.205.219.57... -- I can ping 203.205.219.57 from both servers This is a symptom of your network provider blocking port 25 outbound. That has long been the norm for residential/recreational service and in recent years it has expanded to the low-end hosting market (including Amazon and OVH,) where it is now common for hosting providers to block port 25 outbound by default and either provide an authenticated relay service (e.g. Amazon SES) or to unblock the port by customer request. Making the issue more complex, some providers have implemented port 25 blocking unevenly, so that some of their customers or networks are unblocked despite the official practice.
Re: postfix/smtp Connection timeout
subscription1: > On the failing server I get > --- > >>> telnet 203.205.219.57 25 > Trying 203.205.219.57... This is no longer a Postfix question. You need to fix your network first. Wietse
Re: postfix/smtp Connection timeout
On 4 Jun 2019, at 8:23, subscription1 wrote: telnet on the working server shoews --- >>> telnet 203.205.219.57 25 Trying 203.205.219.57... Connected to 203.205.219.57. Escape character is '^]'. 220 newxmmxsza20.qq.com MX QQ Mail Server. ^] telnet> On the failing server I get --- >>> telnet 203.205.219.57 25 Trying 203.205.219.57... -- I can ping 203.205.219.57 from both servers This is a symptom of your network provider blocking port 25 outbound. That has long been the norm for residential/recreational service and in recent years it has expanded to the low-end hosting market (including Amazon and OVH,) where it is now common for hosting providers to block port 25 outbound by default and either provide an authenticated relay service (e.g. Amazon SES) or to unblock the port by customer request. Making the issue more complex, some providers have implemented port 25 blocking unevenly, so that some of their customers or networks are unblocked despite the official practice. -- Bill Cole b...@scconsult.com or billc...@apache.org (AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Re: postfix/smtp Connection timeout
The two servers are on different machines (different continents, actually) and different domains. I've sent an email to the same (non-existitent) recipient One the working server I get this --- Jun 4 14:06:50 mail1 postfix/submission/smtpd[13650]: connect from unknown[210.185.104.16] Jun 4 14:06:55 mail1 postfix/submission/smtpd[13650]: 312BA29EC56: client=unknown[210.185.104.16], sasl_method=PLAIN, sasl_username=po...@zudiewiener.com Jun 4 14:06:55 mail1 postfix/cleanup[13654]: 312BA29EC56: message-id= Jun 4 14:06:56 mail1 postfix/qmgr[1668]: 312BA29EC56: from=, size=397, nrcpt=1 (queue active) Jun 4 14:06:56 mail1 postfix/submission/smtpd[13650]: disconnect from unknown[210.185.104.16] ehlo=2 starttls=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=8 Jun 4 14:07:04 mail1 postfix/smtp[13655]: 312BA29EC56: to=, relay=mx3.qq.com[203.205.219.57]:25, delay=12, delays=2.7/0.03/8.3/0.55, dsn=5.0.0, status=bounced (host mx3.qq.com[203.205.219.57] said: 550 Mailbox not found. http://service.mail.qq.com/cgi-bin/help?subtype=1&=20022&=1000728 (in reply to RCPT TO command)) Jun 4 14:07:05 mail1 postfix/cleanup[13661]: 6F1F529EC5A: message-id=<20190604120705.6f1f529e...@mail1.zudiewiener.com> Jun 4 14:07:05 mail1 postfix/bounce[13660]: 312BA29EC56: sender non-delivery notification: 6F1F529EC5A Jun 4 14:07:05 mail1 postfix/qmgr[1668]: 6F1F529EC5A: from=<>, size=2689, nrcpt=1 (queue active) Jun 4 14:07:05 mail1 postfix/qmgr[1668]: 312BA29EC56: removed Jun 4 14:07:05 mail1 postfix/lmtp[13662]: 6F1F529EC5A: to=, relay=mail1.zudiewiener.com[private/dovecot-lmtp], delay=0.05, delays=0.02/0.01/0.01/0.01, dsn=2.0.0, status=sent (250 2.0.0 AFPWHOle9lxfNQAAHQghHA Saved) Jun 4 14:07:05 mail1 postfix/qmgr[1668]: 6F1F529EC5A: removed On the failed server I get --- Jun 4 22:07:38 mail postfix/submission/smtpd[14146]: connect from unknown[210.185.104.16] Jun 4 22:07:39 mail postfix/submission/smtpd[14146]: B4C025FA97: client=unknown[210.185.104.16], sasl_method=PLAIN, sasl_username=ll...@dragonclaw.net Jun 4 22:07:39 mail postfix/cleanup[14149]: B4C025FA97: message-id=<55b8c045-0fb9-bece-dd68-9f793260c...@dragonclaw.net> Jun 4 22:07:41 mail postfix/qmgr[11467]: B4C025FA97: from=, size=395, nrcpt=1 (queue active) Jun 4 22:07:41 mail postfix/submission/smtpd[14146]: disconnect from unknown[210.185.104.16] ehlo=2 starttls=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=8 Jun 4 22:08:12 mail postfix/smtp[14150]: connect to mx3.qq.com[203.205.219.57]:25: Connection timed out Jun 4 22:08:12 mail postfix/smtp[14150]: connect to mx3.qq.com[2001:df6:f400::2808]:25: Network is unreachable Jun 4 22:08:12 mail postfix/smtp[14150]: connect to mx2.qq.com[2001:df6:f400::2808]:25: Network is unreachable The telnet on the working server shoews --- >>> telnet 203.205.219.57 25 Trying 203.205.219.57... Connected to 203.205.219.57. Escape character is '^]'. 220 newxmmxsza20.qq.com MX QQ Mail Server. ^] telnet> On the failing server I get --- >>> telnet 203.205.219.57 25 Trying 203.205.219.57... -- I can ping 203.205.219.57 from both servers Thanks Leo On 4/6/19 9:19 pm, Wietse Venema wrote: subscription1: Jun? 4 17:21:11 mail postfix/smtp[11505]: connect to mail1.zudiewiener.com[173.212.231.229]:25: Connection timed out Do the two mail servers run on different machines, each with a different IP address? Does 'telnet 173.212.231.229 25' work from both machines, or does it work only from one machine? Wietse
Re: postfix/smtp Connection timeout
subscription1: > Jun? 4 17:21:11 mail postfix/smtp[11505]: connect to > mail1.zudiewiener.com[173.212.231.229]:25: Connection timed out Do the two mail servers run on different machines, each with a different IP address? Does 'telnet 173.212.231.229 25' work from both machines, or does it work only from one machine? Wietse
postfix/smtp Connection timeout
Hi, I have two mail server configured the same way. A diff of the output of postconf -n shows only (expected) differences for inet_interfaces mydomain myhostname smtpd_banner smtpd_tls_cert_file smtpd_tls_key_file I can send emails from my client from one without fail, while I get connection timeout errors for the other Jun 4 17:20:39 mail postfix/submission/smtpd[11500]: connect from unknown[210.185.104.16] Jun 4 17:20:40 mail postfix/submission/smtpd[11500]: 161365FA82: client=unknown[210.185.104.16], sasl_method=PLAIN, sasl_username=ll...@dragonclaw.net Jun 4 17:20:40 mail postfix/cleanup[11504]: 161365FA82: message-id=<6accc68a-c0b4-033a-f633-2cc22ef5e...@dragonclaw.net> Jun 4 17:20:41 mail postfix/qmgr[11467]: 161365FA82: from=, size=404, nrcpt=1 (queue active) Jun 4 17:20:41 mail postfix/submission/smtpd[11500]: disconnect from unknown[210.185.104.16] ehlo=2 starttls=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=8 Jun 4 17:21:11 mail postfix/smtp[11505]: connect to mail1.zudiewiener.com[173.212.231.229]:25: Connection timed out Jun 4 17:21:41 mail postfix/smtp[11505]: connect to mail1.no-ip.com[8.23.224.50]:25: Connection timed out Jun 4 17:22:11 mail postfix/smtp[11505]: connect to mail2.no-ip.com[69.65.5.119]:25: Connection timed out - Thanks for any help to resolve this. Leo
