The facts would appear to suggest that both sources are accepted by the local SMTP server - as long as you are positive both chains are indeed contacting the same server. Ethereal could show you this.That seems reasonable. However, using the 'mail' utility I can deliver the same mail successfully. I assume mail is using sendmail under the covers, which is doing the same negotiation with the same SMTP server?
A possible scenario would be that the downstream SMTP chain is somehow discriminating against the Python-originated messages. Logs should give evidence here.
So, unless it's a simple typo and you are using different (email or SMTP server) addresses that you think are the same, see my original response, which included
and you need to take the matter up with whoever runs the SMTP server. Are you sure the address is actually valid?
Evidence for and against? These things are a pain, but with patience you can usually track them down. You could try explaining to a stuffed toy, or a sock on your hand, exactly why there can't be anything wrong with your code. My wife's bears are very forbearing [n.p.i.]. Whatever it takes to break the perceptual barrier.
We now return you to your regular episode of scheduled tasks ...
regards Steve -- Steve Holden +1 703 861 4237 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ Python Web Programming http://pydish.holdenweb.com/
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