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Sender verify failed on valid accounts

Discussion in 'E-mail Discussions' started by Alejandro P, Nov 23, 2007.

  1. Alejandro P

    Alejandro P Well-Known Member

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    I have this customer who have been having trouble to receive some emails from valid senders due to Sender verify failed, both senders have valid accounts.


    Here is an example,

    De: MDaemon at zeus.XServer.com [mailto:MDaemon@zeus.XServer.com]
    Enviado el: sábado, 17 de noviembre de 2007 11:16 a.m.
    Para: albertocarbone@XServer.com
    Asunto: Error permanente de entrega

    Failed address: jsoler@CustomerDomain.com

    --- Session Transcript ---
    Sat 2007-11-17 11:15:19: Parsing message
    [xxxxxxxxxxxxxxxxxxxxxxxx\pd35000148823.msg]
    Sat 2007-11-17 11:15:19: * From: albertocarbone@XServer.com
    Sat 2007-11-17 11:15:19: * To: jsoler@CustomerDomain.com
    Sat 2007-11-17 11:15:19: * Subject: RE: Zona Franca.- Concepto.-
    Sat 2007-11-17 11:15:19: * Message-ID:
    [003201c82934$ba953d00$2fbfb700$@com]
    Sat 2007-11-17 11:15:19: Intentando SMTP conexión con [CustomerDomain.com]
    Sat 2007-11-17 11:15:19: Resolviendo registros MX para [ CustomerDomain.com]
    (Servidor DNS: 200.118.2.66)...
    Sat 2007-11-17 11:15:23: * P=000 S=000 D=CustomerDomain.com TTL=(240)
    MX=[ CustomerDomain.com] {xx.xxx.13.172}
    Sat 2007-11-17 11:15:23: Intentando SMTP conexión con [xx.xxx.13.172:25]
    Sat 2007-11-17 11:15:23: Esperando la conexión del socket...
    Sat 2007-11-17 11:15:23: * Conexión establecida (xx.yyy.51.30:3948 -]
    xx.xxx.13.172:25)
    Sat 2007-11-17 11:15:23: Esperando la iniciación del protocolo...
    Sat 2007-11-17 11:15:25: [-- 220-svr01.customerDomainHost.com ESMTP Exim 4.68 #1
    Sat, 17 Nov 2007 11:15:29 -0500
    Sat 2007-11-17 11:15:25: [-- 220-We do not authorize the use of this system
    to transport unsolicited,
    Sat 2007-11-17 11:15:25: [-- 220 and/or bulk e-mail.
    Sat 2007-11-17 11:15:25: --] EHLO zeus.XServer.com
    Sat 2007-11-17 11:15:25: [-- 250-svr01.customerDomainHost.com Hello zeus.XServer.com
    [xx.yyy.51.30]
    Sat 2007-11-17 11:15:25: [-- 250-SIZE 52428800
    Sat 2007-11-17 11:15:25: [-- 250-PIPELINING
    Sat 2007-11-17 11:15:25: [-- 250-AUTH PLAIN LOGIN
    Sat 2007-11-17 11:15:25: [-- 250-STARTTLS
    Sat 2007-11-17 11:15:25: [-- 250 HELP
    Sat 2007-11-17 11:15:25: --] STARTTLS
    Sat 2007-11-17 11:15:26: [-- 220 TLS go ahead
    Sat 2007-11-17 11:15:26: SSL negotiation successful (TLS 1.0, 1024 bit key
    exchange, 128 bit RC4 encryption)
    Sat 2007-11-17 11:15:26: --] EHLO zeus.XServer.com
    Sat 2007-11-17 11:15:26: [-- 250-svr01.customerDomainHost.com Hello zeus.XServer.com
    [xx.yyy.51.30]
    Sat 2007-11-17 11:15:26: [-- 250-SIZE 52428800
    Sat 2007-11-17 11:15:26: [-- 250-PIPELINING
    Sat 2007-11-17 11:15:26: [-- 250-AUTH PLAIN LOGIN
    Sat 2007-11-17 11:15:26: [-- 250 HELP
    Sat 2007-11-17 11:15:26: --] MAIL From:[ albertocarbone@XServer.com
    [mailto:albertocarbone@XServer.com] ]
    SIZE=23231
    Sat 2007-11-17 11:15:26: [-- 250 OK
    Sat 2007-11-17 11:15:26: --] RCPT To:[jsoler@CustomerDomain.com]
    Sat 2007-11-17 11:15:30: [-- 550-Verification failed for
    [albertocarbone@XServer.com]
    Sat 2007-11-17 11:15:30: [-- 550-Called: 82.165.181.92
    Sat 2007-11-17 11:15:30: [-- 550-Sent: RCPT
    TO:[albertocarbone@XServer.com]
    Sat 2007-11-17 11:15:30: [-- 550-Response: 550 Backscatter Protection
    detected an invalid or expired email address
    Sat 2007-11-17 11:15:30: [-- 550 Sender verify failed
    Sat 2007-11-17 11:15:30: --] QUIT
    --- End Transcript ---

    Here is another example

    2007-11-19 11:50:19 H=dom21.ipowerweb.com [72.22.92.57] sender verify fail for [hguzman@hoftxxx.net]
    2007-11-19 11:50:19 H=dom21.ipowerweb.com [72.22.92.57] F=[hguzman@hoftxxx.net] rejected RCPT [jsoler@CustomerDomain.com]: Sender verify failed

    Both accounts are valid.

    Any ideas on what would be wrong?
     
  2. gizzmo2006

    gizzmo2006 Active Member

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    Re:

    Hello Alejandro,

    i have unchecked:

    Use callouts to verify the existence of email senders. Basiclly, exim will connect to the mail exchanger for a given address to make sure it exists before accepting mail from it.

    and:

    Verify the existence of email senders.

    in Exim Configuration Editor.

    I have had a lot of problems if these options are checked.

    Regards Frank
     
  3. AndyReed

    AndyReed Well-Known Member
    PartnerNOC

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  4. Alejandro P

    Alejandro P Well-Known Member

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    Is not a local problem,

    [root@svr01 new]# exim -bt albertocarbone@XServer.com
    router = lookuphost, transport = remote_smtp
    host XServer.com [xx.xx.181.92] MX=10
    host zeus.XServer.com [xxx.xxx.51.30] MX=20

    At least for Xserver.com seems to be a problem from the other end
    Sat 2007-11-17 11:15:30: [-- 550-Response: 550 Backscatter Protection detected an invalid or expired email address
    Sat 2007-11-17 11:15:30: [-- 550 Sender verify failed

    Seems that server doesn't allow the address verification, am I wrong?

    I have disabled Use callouts to verify the existence of email senders. as per your suggestion but not sure what impact will this have on the ammount of spam being accepted on the server.
     
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