Re: Outgoing mail is defered (not bounced) if EHLO returns 550 and closes connection

2020-07-28 Thread Michael Wyraz
Hello, thank you for the Feedback. I'll contact the receiver's postmaster and tell them the RFC violation. To work around this you can set an smtp_reply_filter: /etc/postfix/main.cf: smtp_reply_filter = pcre:/etc/postfix/smtp_reply_filter.pcre /etc/postfix/smtp_reply_filter.pcre /

Re: Outgoing mail is defered (not bounced) if EHLO returns 550 and closes connection

2020-07-28 Thread Peter
On 29/07/20 9:54 am, Michael Wyraz wrote: Hello Wietse, thank you for the response. I tried to find the correct section in RFCs that describes this but I did not find the place where it defines that a EHLO cannot be answered with a 550 Can you point me to the right RFC section? It can be,

Re: Outgoing mail is defered (not bounced) if EHLO returns 550 and closes connection

2020-07-28 Thread Wietse Venema
Michael Wyraz: > Hello Wietse, > > thank you for the response. I tried to find the correct section in RFCs > that describes this but I did not find the place where it defines that a > EHLO cannot be answered with a 550. Of course it can send 5XX any time. Where does the RFC say that a server c

Re: Outgoing mail is defered (not bounced) if EHLO returns 550 and closes connection

2020-07-28 Thread Michael Wyraz
Hello Wietse, thank you for the response. I tried to find the correct section in RFCs that describes this but I did not find the place where it defines that a EHLO cannot be answered with a 550. Can you point me to the right RFC section? Best regards, Michael. Michael Wyraz: Hello, I'm

Re: Outgoing mail is defered (not bounced) if EHLO returns 550 and closes connection

2020-07-28 Thread Wietse Venema
Michael Wyraz: > Hello, > > I'm running a postfix mail server on a fresh IP address that has some > bad reputation from the previous owner. So I had a lot of bounces in the > last days which I had to clean up. > > One customer complained about a bounce that returned after few days (all > other

Re: Outgoing mail is defered (not bounced) if EHLO returns 550 and closes connection

2020-07-28 Thread Michael Wyraz
Hello, Looks like your IP address is blocked by Cloudmark I'm totally aware of that. My issue is not that I'm blocked but that the message got deferred instead of bounced (although the remote sent a 550). Best regards, Michael.

Re: Outgoing mail is defered (not bounced) if EHLO returns 550 and closes connection

2020-07-28 Thread Jos Chrispijn
On 28-7-20 23:02, Michael Wyraz wrote: I'm not 100% if that's a BUG or misconfiguration or misbehavior of the other MTA. But the resulting behavior is at least not what's expected. Looks like your IP address is blocked by Cloudmark -- CUT -- If you believe the reputation of your IP address i