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Hi!

I noted that the confirmation is sent to envelope sender, which is
right.

Also, the confirmation is done *on* the envelope sender address. I
think that the confirmed address should be taken from "From: " or
"Reply-to" headers, not from envelope sender.

This causes problem, when two users use TMDA and one of them has a
dated envelope sender (as I do). If he/she gets a confirmation
request, he will respond, then the receiving end will confirm the
dated address, not the sender address.

For example, I send a message to an unknown TMDA user. I have
configuration where my envelope sender address is dated, and "From:"
header is i my real email address.

As a reply, I get a confirmation message to the dated address, which
will pass through. Unfortunately, when I respond the message, it will
confirm my *dated* address, not my real email address..

This has really happened. My opinion is that the confirmation should
confirm the address that is in the "From" header (or "Reply-to"?),
not the envelope sender. Is there any reason to confirm the envelope
sender? Security? Someone could confirm other people's email?

BTW.. another solution would be to confirm addresses without the added
extra '+dated..' part. But since the delimiter is not a standard, the
receiving end would not know what is the sender's delimiter..
- -- 
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