[Mimedefang] How to change envelope sender?

Tilman Schmidt t.schmidt at phoenixsoftware.de
Fri May 3 12:24:38 EDT 2013

Am 03.05.2013 um 08:18 schrieb Benoit Panizzon <benoit.panizzon at imp.ch>:

> Well, what's worse?
> - Backscatter? (and getting your server in blacklists because of that).
> - Sender not knowing his email got not forwarded (but the one forwarding his 
> address can check upon that).
> I do consider backscatter the more serious problem.

I strongly disagree. Notifying the sender of delivery problems is an essential and nonnegotiable element of E-mail. IOW dropping a mail without notifying the server is Bad. Full stop. 

Backscatter OTOH is a nuisance, which should be minimized of course, but cannot be completely avoided. Blacklisting because of backscatter would be a Bad Idea (TM) which I thankfully never encountered so far, but if someone did that it would certainly be their own fault if they blocked legitimate mail as a result. In my experience, misguided measures like that tend to get lifted very quickly if senders and (intended) recipients of blocked mails are informed in no unclear words who's responsible for the communication failure. 


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