David Legg schrieb:
I'm not sure I follow. I was assuming that you only apply the VERP
technique to test incoming messages that are bounce messages. I
vaguely recollect that this is a problem in itself as not every mail
agent uses a standard for this.
That's true. There is a standard for generating bounces and most mail
servers implement it correctly, but I get a lot of bounces or other more
or less clever replies to spam mails with forged sender adresses, which
are not formatted correctly. Out-of-office replies and some kind of
clever "you have to click this URL to confirm your mail" are rather
common as well.
However, I still don't see the point in VERP anyway. It obviously would
confuse your recipients, as they get mails from you from different
addresses each time. If a recipient copies one of your sender addresses
to his/her address book, will the receiving server accept more than one
mail to that address? And if it is only able to filter out correctly
formatted bounces anyway, it is rather easy to do that without messing
with VERP. I am not sure if it is really required, but most mail servers
include at least the beginning of the causing mail, when they generate a
bounce. After checking for fake received-headers, it is not too
difficult to determine if the causing mail originated from a "trusted
source".
Tor
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