Stefan Palme wrote:
Hmmm. Maybe I did not understand you, or you me... ;-)

I want the From address to be set to something like [EMAIL PROTECTED]
A mail sent to this address will cause no error, but nobody will
read those emails.

The Reply-To-address will become a really existing address which is read
by someone, so that replying to an email works as expected.


there is no fundamental difference between

From: [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]

and

From: [EMAIL PROTECTED]




So all those "legitimate bounces", which go to the envelope FROM address
(= address in From: header, caused by our email sending tool)

no. The envelope sender is not the address in the From header. you can use a better mailer that allows you to select the values for each field.

will be
received by our server, but never read by someone;  and all ligitmate
replies, which go to the Reply-To address, will be received and read
normally.

Because bounces go to the envelope FROM, and I dont want to receive
bounces,

You can't ignore bounces. you must process the bounces and remove bad addresses from your recipient list. you can also use the bounces to detect bad IPs that try to invite/subscribe/... arbitrary addresses.


I have to set the envelope FROM to a "dummy" mail address. The address in the From: header could be "my" email address, but because
of limitations in the used email sending tool the From: header address
and the envelope FROM always equal.

then use another tool. There is no place for ratware anymore. if it has the described limitation, it probably has other problems.

otherwise, yes, you can use the From: header to force the envelope sender and use reply-to for the "reachable" address.

BTW. do not "forge" the From display name. some sites will use
From: John Didnot <[EMAIL PROTECTED]>

if John Didnot user invites a friend. This is bad because MUAs import addresses automatically. so next time foo wants to write to "John Didnot", his MUA will select your address.


Maybe the weak point here is the From: header address being always the
same as the envelope FROM ?

this is not a problem.

That said, if your From: header has no display part, your mail may end up in a junk quarantine/folder...


This part I dont't understand. When our web application sends the
following mail:

  From: [EMAIL PROTECTED]
  To: [EMAIL PROTECTED]

using [EMAIL PROTECTED] in the "MAIL FROM" during SMTP communication,
and there is no "somebody" at Yahoo, a bounce message to
[EMAIL PROTECTED] could be the result. This address is a valid
address, but all emails sent to this address will be thrown away
as soon as received. How wants Yahoo detect this and blame me for this?

If you send me mail, I may want to reach you (complain, ask a question, ... etc). if nobody is there to answer, I consider this fraudulous. If you are not reachable, you are not responsible, and we have no time for you. you'll be simply listed as "undesirable".



Ahm - maybe we misunderstood in this point: all references to
"example.com" in my postings should be replaced by my REAL domain
name - of course I do not want to send mails with "[EMAIL PROTECTED]"
as sender address - I've used it just as a placeholder... :)


That's ok.

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