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remote_smtp defer (-44): SMTP error from remote mailer

Discussion in 'E-mail Discussions' started by netlook, Dec 6, 2004.

  1. netlook

    netlook Well-Known Member
    PartnerNOC

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    Hello,

    I have a problem with sending mails from PHP script :

    delivering 1CbJTL-0005cd-Tn
    Connecting to mx.domain.com [123.123.123.123]:25 ... connected
    SMTP<< 220 mx.domain.com ESMTP Postfix
    SMTP>> EHLO hostname.com
    SMTP<< 250-mx.domain.com
    250-PIPELINING
    250-SIZE 30000000
    250-VRFY
    250-ETRN
    250 8BITMIME
    SMTP>> MAIL FROM:<nobody@hostname.com> SIZE=9847
    SMTP>> RCPT TO:<user@domain.com>
    SMTP>> DATA
    SMTP<< 250 Ok
    SMTP<< 450 Server configuration problem
    SMTP<< 554 Error: no valid recipients
    SMTP>> QUIT
    LOG: MAIN
    == user@domain.com R=lookuphost T=remote_smtp defer (-44): SMTP error from remote mailer after RCPT TO:<user@domain.com>: host mx.domain.com [123.123.123.123]: 450 Server configuration problem

    --

    Anybody had such problem before? Any idea? :confused:
     
  2. netlook

    netlook Well-Known Member
    PartnerNOC

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    I found the solutions - simply turn off SMTP Tweak in WHM/Security Setup.

    BTW - what for is SMTP Tweak and is it safely to turn it off? :cool:

    Thank you
     
  3. grgur

    grgur Member

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    Thanks, just saved me hours with this tip!
     
  4. amal

    amal Well-Known Member

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    Well, I never had a problem with the SMTP tweak turned on.. What kind of error do you get on /var/log/exim_mainlog?

    SMTP tweak prevents certain kind of spam mails that could be sent from the server..It won't allow normal users to connect to remote SMTP servers.
     
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