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550 5.7.1 SPF unauthorized mail is prohibited

    Question

  • I have a client receiving the message:

    You do not have permission to send to this recipient.  For assistance, contact your system administrator.

                <mail.server.com #5.7.1 smtp;550 5.7.1 SPF unauthorized mail is prohibited.>

    There are about 10 different mail servers that are rejecting mail from their server. I have not been able to find much information on what causes a 5.7.1 SPF.

    Environment - Exchange 2003 running on SBS 2003 SP2

    I checked the default SMTP virtual server -> General->Advanced->Identification and have the following checked:
    - apply sender filter
    - apply receipient filter
    - apply connection filter
    - apply IMF
    Apply Sender ID Filter is not checked

    I am posting that information because an article said that our internal sever may be blocking us. Based on the Exchange logs I belive it is the receipient's mail server that is blocking us.

    216.69.186.201 - OutboundConnectionResponse [20/Oct/2009:19:55:19 -0500] "- -?220 m1pismtp01-005.prod.mesa1.secureserver.net ESMTP SMTP" 0 52
    216.69.186.201 - OutboundConnectionCommand [20/Oct/2009:19:55:19 -0500] "EHLO -?mail.server.com SMTP" 0 4
    216.69.186.201 - OutboundConnectionResponse [20/Oct/2009:19:55:19 -0500] "- -?250-m1pismtp01-005.prod.mesa1.secureserver.net SMTP" 0 46
    216.69.186.201 - OutboundConnectionCommand [20/Oct/2009:19:55:19 -0500] "MAIL -?FROM:<user@server.com> SIZE=1736 SMTP" 0 4
    216.69.186.201 - OutboundConnectionResponse [20/Oct/2009:19:55:19 -0500] "- -?250 sender <user@server.com> ok SMTP" 0 31
    216.69.186.201 - OutboundConnectionCommand [20/Oct/2009:19:55:19 -0500] "RCPT -?TO:<someone@motionwise.com> SMTP" 0 4
    216.69.186.201 - OutboundConnectionResponse [20/Oct/2009:19:55:19 -0500] "- -?250 recipient <someone@motionwise.com> ok SMTP" 0 41
    216.69.186.201 - OutboundConnectionCommand [20/Oct/2009:19:55:19 -0500] "DATA - SMTP" 0 4
    216.69.186.201 - OutboundConnectionResponse [20/Oct/2009:19:55:19 -0500] "- -?550 5.7.1 SPF unauthorized mail is prohibited. SMTP" 0 46
    216.69.186.201 - OutboundConnectionCommand [20/Oct/2009:19:55:19 -0500] "QUIT - SMTP" 0 4
    216.69.186.201 - OutboundConnectionResponse [20/Oct/2009:19:55:19 -0500] "- -?221 m1pismtp01-005.prod.mesa1.secureserver.net SMTP" 0 46 

    Any assistance is greatly appreciated.

    Alex


    Wednesday, October 21, 2009 4:49 PM

Answers

  • Hi Alex,

    Please check your SPF record in your external DNS. This should have all mailservers listed which are allowed to send mail as your domain.

    Regards,

    Johan
    blog: www.johanveldhuis.nl
    • Proposed as answer by Mike Shen Monday, November 02, 2009 6:31 AM
    • Marked as answer by Mike Shen Friday, November 06, 2009 9:16 AM
    Wednesday, October 21, 2009 8:02 PM

All replies

  • Hi Alex,

    Please check your SPF record in your external DNS. This should have all mailservers listed which are allowed to send mail as your domain.

    Regards,

    Johan
    blog: www.johanveldhuis.nl
    • Proposed as answer by Mike Shen Monday, November 02, 2009 6:31 AM
    • Marked as answer by Mike Shen Friday, November 06, 2009 9:16 AM
    Wednesday, October 21, 2009 8:02 PM
  • 550 5.7.1 SPF unauthorized mail is prohibited

    Getting this bounce back messge to some domains when attempting to send mail.

    Mail server is listed on SPF Record. What else could be causing this issue with outgoing mail.

    Environment - Exchange 2003 running on SBS 2003 SP2

    Its random, not all clients get rejected by the same address everytime, might be every other message, and other clients every message to certain email addresses. No pattern.

    Any help or suggestions would be appreciated!

    Wednesday, February 08, 2012 8:10 PM
  • Johan already explained what the rejection response means.

    If you need more help you need to tell us your sending server IP and the SPF text record.

    If it turns out that the IP is truly allowed, than most likely we are looking at the wrong IP. This happens if your emails are being relayed by some intermediate host whose IP is not allowed by the SPF record (for example).

    At the end the answer is always the same...


    IMF Tune - Anti-spam extending the Exchange 2003, 2007, 2010 IMF/Content Filter - http://www.windeveloper.com/imftune/

    Wednesday, February 08, 2012 9:25 PM
  • Server IP  is  75.145.8.45

    SPF is    v=spf1 ip4:75.145.8.45/32 mx -all

    Thanks Much

    Thursday, February 09, 2012 12:49 AM