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On Sunday 20 September 2009, Stroller wrote: |
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> On 20 Sep 2009, at 12:30, Mick wrote: |
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> > ... |
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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 |
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> > 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 : |
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> > invalid sender |
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> > 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 |
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> > allocated IP |
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> > address resolves to an ISP domain instead of myserver.mydomain.com? |
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> |
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> I'm not quite clear. Does the myserver.mydomain.com resolve to the |
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> server actually sending the mail? I think that may be what they're |
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> asking for. |
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|
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Thanks Stroller! That was it! For some reason the particular subdomain had |
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been taken out of the list of DynDNS and therefore it would no longer resolve |
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to the server's IP address. It goes to show ... start with the obvious |
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things first. Thank goodness I did not started hacking the sendmail |
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configuration! Ha, ha! |
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-- |
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Regards, |
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Mick |
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