[Zope] dtml-sendmail and envelop sender [Q]

[Frank Tegtmeyer]

>      4.4.4.  AUTOMATIC USE OF FROM / SENDER / REPLY-TO
> 
>         For systems which automatically  generate  address  lists  for
>         replies to messages, the following recommendations are made:


This relates to automates like autoresponders (vacation mail etc) that 
process the mail at it's destination. The envelope sender may not 
available there.

All MTA's (qmail, postfix, exim, sendmail, smail, ...) that transport the 
mail  (MTA = mail transport agent) nearer to it's final destination bounce 
undeliverable messages to the envelope sender.

> So according to the spec I should use "Sender: <dtml-var
> OurBounceProcessingAccount>" in our DTML-Method that uses dtml-sendmail, no?

To handle autoresponders etc. that's ok. It doesn't handle delivery 
failures. You HAVE TO set the envelope sender accordingly (I think for 
Postfix it's the -f switch like for sendmail). To do that you have to 
generate a new method - possibly as external Python method.

> envelope-sender ... Is the envelope-sender then the user that is passed to
> postfix when doing the SMTP connection and giving the mail from: command?
Exactly that is the envelope sender.

> Maybe my mistake is in the term "envelope-sender"?
Maybe you confuse heders and envelope in general (don't worry, that's 
common). To understand it simply think about traditional letters:
If you put a letter that has to be sent from 'A' to 'B' in an envelope 
that states a sender 'X' and a receiver 'Y' the delivery service will also 
return it to 'Y' regardless what the "headers" on the letter say. The only 
criterium is the envelope. If 'Y' is not reachable the letter will return 
to 'X', not to 'A'.

Regards, Frank