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Unable to send emails to addresses

By joycetm ·
Hello,

I am running Exchange 5.5 on a Windows 2000 Server. I am experiencing unsuccessful emails messages going out to to certain sites. I have the following message :-

'Unable to deliver the message due to a communications failure.'

I did not see any other errors on the Event Viewer logs. Have also checked that the e-mail address is valid and I could send to the same e-mail address from another site.

Would appreciate if anyone has any ideas.

Thank you,
Joyce

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Unable to send emails to addresses

by acattr In reply to Unable to send emails to ...

That error is so generic its hard to find any help on it. If no one else finds a better solution, try what I have done in the past. On my DNS servers, I would create zones with the proper MX records for the domains I have had trouble sending mail to. This would eliminate any external DNS issues.

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Unable to send emails to addresses

by joycetm In reply to Unable to send emails to ...

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Unable to send emails to addresses

by sfertic In reply to Unable to send emails to ...

It sounds like a bad NIC card to me.

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Unable to send emails to addresses

by joycetm In reply to Unable to send emails to ...

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Unable to send emails to addresses

by dbesenho In reply to Unable to send emails to ...

If you can send mail to them from an external email address, then you know the problem is dns from your location/isp. You can either call your isp and have them update their entries, or you can do as answer 1 suggests and add the mx records to yourdns. This is what I usually do, although it's probably more technically correct to make the isp fix it. You can get the mx info from nslookup.

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Unable to send emails to addresses

by joycetm In reply to Unable to send emails to ...

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Unable to send emails to addresses

by joycetm In reply to Unable to send emails to ...

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