Exim: 550 at RCPT TO but retries later?! WTF?

[SubZero]

Hi,

I have an exim problem. Exim is retrying a mail that receives 550 at RCPT TO field. How do I fix this behavior?

Connecting to dpexh.digiturk.com.tr [212.252.206.1]:25 from 209.xxx.xxx.xxx ... connected
  SMTP<< 220 Welcome...
  SMTP>> EHLO host.xxxxxx.com
  SMTP<< 250-Hello host.xxxxxx.com, pleased to meet you
         250 SIZE
  SMTP>> MAIL FROM:<> SIZE=111333
  SMTP<< 250 <> SIZE=111333 ... Sender ok
  SMTP>> RCPT TO:<DIGITURKMEDYA.PAZARLAMA@digiturk.com.tr>
  SMTP<< 550 Mailbox unavailable.
  SMTP>> QUIT
LOG: MAIN
  ** digiturkmedya.pazarlama@digiturk.com.tr <DIGITURKMEDYA.PAZARLAMA@digiturk.com.tr> R=my_lookuphost T=my_remote_smtp: SMTP error from remote mail server after RCPT TO:<DIGITURKMEDYA.PAZARLAMA@digiturk.com.tr>: host dpexh.digiturk.com.tr [212.252.206.1]: 550 Mailbox unavailable.
LOG: MAIN
  Frozen (delivery error message)

[chirpy]

Is dpexh.digiturk.com.tr your server? If not, then it's a remote SMTP error, i.e. the error is coming from that server and the problem lies there not with your server. If that is your server, you need to check the exim logs.

[SubZero]

No it is not. My problem is this mail is trying to be sent over and over again as I retry. I am seeing similar wrongly done retries to 5xx errors. It is not limited with those null senders... here is a sample:

delivering 1Epxhp-0005ac-9C
Connecting to mx2.hotmail.com [65.54.245.40]:25 from 209.59.173.155 ... connected
SMTP<< 220 bay0-mc10-f9.bay0.hotmail.com Sending unsolicited commercial or bulk e-mail to Microsoft's computer network is prohibited. Other restrictions are found at http://privacy.msn.com/Anti-spam/. Violations will result in use of equipment located in California and other states. Sat, 24 Dec 2005 04:30:22 -0800
SMTP>> EHLO host.sukela.com
SMTP<< 250-bay0-mc10-f9.bay0.hotmail.com (3.1.0.17) Hello [209.59.173.155]
250-SIZE 29696000
250-PIPELINING
250-8bitmime
250-BINARYMIME
250-CHUNKING
250-AUTH LOGIN
250-AUTH=LOGIN
250 OK
SMTP>> MAIL FROM:<> SIZE=2586
SMTP>> RCPT TO:<xhcnzwfuouh@hotmail.com>
SMTP>> DATA
SMTP<< 250 <>....Sender OK
SMTP<< 550 Requested action not taken: mailbox unavailable
SMTP<< 503 Need Rcpt command.
SMTP>> QUIT
LOG: MAIN
** xhcnzwfuouh@hotmail.com R=my_lookuphost T=my_remote_smtp: SMTP error from remote mail server after RCPT TO:<xhcnzwfuouh@hotmail.com>: host mx2.hotmail.com [65.54.245.40]: 550 Requested action not taken: mailbox unavailable
LOG: MAIN
Frozen (delivery error message)

and another:

delivering 1Eq67d-0000aN-Uj
Connecting to mx4.hotmail.com [65.54.190.179]:25 from 209.59.173.155 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
mx4.hotmail.com [65.54.190.179]: Connection timed out
Connecting to mx4.hotmail.com [65.54.244.104]:25 from 209.59.173.155 ... connected
SMTP<< 220 bay0-mc4-f3.bay0.hotmail.com Sending unsolicited commercial or bulk e-mail to Microsoft's computer network is prohibited. Other restrictions are found at http://privacy.msn.com/Anti-spam/. Violations will result in use of equipment located in California and other states. Sat, 24 Dec 2005 04:31:10 -0800
SMTP>> EHLO host.sukela.com
SMTP<< 250-bay0-mc4-f3.bay0.hotmail.com (3.1.0.17) Hello [209.59.173.155]
250-SIZE 29696000
250-PIPELINING
250-8bitmime
250-BINARYMIME
250-CHUNKING
250-AUTH LOGIN
250-AUTH=LOGIN
250 OK
SMTP>> MAIL FROM:<> SIZE=2818
SMTP>> RCPT TO:<qdphgewpeci@hotmail.com>
SMTP>> DATA
SMTP<< 250 <>....Sender OK
SMTP<< 550 Requested action not taken: mailbox unavailable
SMTP<< 503 Need Rcpt command.
SMTP>> QUIT
LOG: MAIN
** qdphgewpeci@hotmail.com R=my_lookuphost T=my_remote_smtp: SMTP error from remote mail server after RCPT TO:<qdphgewpeci@hotmail.com>: host mx4.hotmail.com [65.54.244.104]: 550 Requested action not taken: mailbox unavailable
LOG: MAIN
** qdphgewpeci@hotmail.com: retry timeout exceeded
LOG: MAIN
qdphgewpeci@hotmail.com: error ignored
LOG: MAIN
Completed

wow.. this one suddenly removed itself. the one above is still retriable... strangely..

what could be the cause of this 5xx error retrying

[RickG]

what could be the cause of this 5xx error retrying

To clarify, is your expectation that a 550 response from the receiving server should bounce back a message to the original sender (like User Unkown) vs. leaving the message in the queue for retrying?

[SubZero]

To clarify, is your expectation that a 550 response from the receiving server should bounce back a message to the original sender (like User Unkown) vs. leaving the message in the queue for retrying?

Yes. Exactly... The to-be-sent mails are in my queue but they are re-tried after some time to check weather they are deliverable or not... even if they get a 550 error, they are blindly re-tried over and over again.

It is really strange that all of my waiting messages are null (<>) sender... But I have seen some non-null senders waiting too..

Delivery attempt for Message ID 1EqdGQ-0004W4-OO

Message 1EqdGQ-0004W4-OO is no longer frozen
delivering 1EqdGQ-0004W4-OO
Connecting to in1.smtp.messagingengine.com [66.111.4.70]:25 from 209.59.xxx.xxx ... connected
  SMTP<< 220 mx1.messagingengine.com ESMTP . No UCE permitted.
  SMTP>> EHLO host.xxxxxx.com
  SMTP<< 250-mx1.messagingengine.com
         250-PIPELINING
         250-SIZE 71000000
         250-ETRN
         250 8BITMIME
  SMTP>> MAIL FROM:<> SIZE=11733
  SMTP>> RCPT TO:<yonteklimited7@internet-e-mail.com>
  SMTP>> DATA
  SMTP<< 250 Ok
  SMTP<< 550 <yonteklimited7@internet-e-mail.com>: Recipient address rejected: User unknown in local recipient table
  SMTP<< 554 Error: no valid recipients
  SMTP>> QUIT
LOG: MAIN
  ** yonteklimited7@internet-e-mail.com R=my_lookuphost T=my_remote_smtp: SMTP error from remote mail server after RCPT TO:<yonteklimited7@internet-e-mail.com>: host in1.smtp.messagingengine.com [66.111.4.70]: 550 <yonteklimited7@internet-e-mail.com>: Recipient address rejected: User unknown in local recipient table
LOG: MAIN
  Frozen (delivery error message)

Delivery attempt for Message ID 1EqXCZ-0001Ag-6q

Message 1EqXCZ-0001Ag-6q is no longer frozen
delivering 1EqXCZ-0001Ag-6q
Connecting to gmail-smtp-in.l.google.com [64.233.163.27]:25 from 209.59.xxx.xxx ... connected
  SMTP<< 220 mx.gmail.com ESMTP 5si4484637nzk
  SMTP>> EHLO host.xxxxxx.com
  SMTP<< 250-mx.gmail.com at your service
         250-SIZE 20971520
         250-8BITMIME
         250 ENHANCEDSTATUSCODES
  SMTP>> MAIL FROM:<> SIZE=3210
  SMTP<< 250 2.1.0 OK
  SMTP>> RCPT TO:<complex667@gmail.com>
  SMTP<< 550 5.7.1 No such user 5si4484637nzk
  SMTP>> QUIT
LOG: MAIN
  ** complex667@gmail.com R=my_lookuphost T=my_remote_smtp: SMTP error from remote mail server after RCPT TO:<complex667@gmail.com>: host gmail-smtp-in.l.google.com [64.233.163.27]: 550 5.7.1 No such user 5si4484637nzk
LOG: MAIN
  Frozen (delivery error message)

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