When using LTMP transport for delivery, what happens if LMTP kicks back an 
error condition to Exim?  For instance in the following LTMP conversation:

=> LHLO ...
<= 250 OK
=> MAIL FROM:<>
<= 250 OK
=> RCPT TO:<[email protected]>
<= 250 OK
=> DATA
<= 354 OK
=> ... <message> ...
=> . <cr><lf>
<= 550 rejected


What exactly happens?  Is a SMTP error (4xx or 5xx) generated back to the 
sending MTA or is it to late by then?  

If it's too late to return an SMTP error, does Exim handle the 4xx and 5xx at 
LMTP differently?  Meaning a 5xx would generate a bounce and a 4xx would be 
queued for later delivery attempts?


--
Robert
inoc.net!rblayzor
http://inoc.net/




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