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Hi All, |
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|
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Up until a few months ago the ISP of the network in question was happy to |
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accept and relay messages from my server <myserver.mydomain.com> which runs |
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nagios. My server gets its IP address from the ISP in question dynamically |
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so I use DynDNS to map the subdomain.domain name to it. |
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|
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To be able to relay messages I of course have set up sendmail to authenticate |
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using email_account@×××.com/passwd_on_ISP. |
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|
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When the ISP stopped accepting messages I started getting this error message: |
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================================================================ |
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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 : invalid |
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sender domain) |
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|
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-----Transcript of session follows ----- |
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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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<<< 550 5.1.0 <nagios@×××××××××××××××××.com> sender rejected : 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 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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Is there something I could change in the configuration of my server to make |
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this work again? |
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-- |
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Regards, |
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Mick |
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