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On Sunday 20 September 2009, Harry Putnam wrote: |
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> Mick <michaelkintzios@×××××.com> writes: |
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> > -----The following addresses had permanent fatal errors----- |
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> > <email_account@×××.com> |
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> > (reason: 550 5.1.0 <nagios@×××××××××××××××××.com> sender rejected : |
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> > invalid sender domain) |
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> > |
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> > -----Transcript of session follows ----- |
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> > |
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> > ... while talking to smtp.ISP.com: |
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> >>>> MAIL From:<nagios@×××××××××××××××××.com> SIZE=745 AUTH=<> |
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> > |
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> > <<< 550 5.1.0 <nagios@×××××××××××××××××.com> sender rejected : invalid |
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> > sender domain |
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> > 554 5.0.0 Service unavailable |
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> > ================================================================ |
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> > |
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> > Does this fail because the ISP's reverse DNS on my dynamically allocated |
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> > IP address resolves to an ISP domain instead of myserver.mydomain.com? |
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> > |
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> > Is there something I could change in the configuration of my server to |
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> > make this work again? |
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> |
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> I think you might avoid the problem by making sendmail Impersonate your |
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> isps domain. |
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> |
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> Using some or all of these settings in sendmail.mc |
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> MASQUERADE_AS(`yourISP.domain')dnl |
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> MASQUERADE_DOMAIN(`youractual.domain')dnl |
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> FEATURE(masquerade_entire_domain)dnl |
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> FEATURE(masquerade_envelope)dnl |
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|
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Yes, that should fix the reverse DNS problem alright, but then people who |
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receive email notifications from myserver will be confused by the domain that |
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these messages are sent from. |
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|
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I could also use the ISP's domain for my IP address in the server's /etc/hosts |
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file - although it would have the same problem with regards to the domain |
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that messages are sent from. |
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-- |
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Regards, |
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Mick |
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