Diego 'Flameeyes' Pettenò wrote: >> Of course, MUAs such as Thunderbird don't give you the possibility to >> set that and it will be the same as your From address. >> > Shouldn't be your provider's mail server to set it? Both of my SSL-enabled > mail servers, that are authenticated (GMail and the Italian postal service) > set this correctly, thus I don't have the SPF_NEUTRAL error on them. >
Return-Path header field is introduced by the MTA when it receives the
mail from the other party. The protocol is like this:
...
mail from: [EMAIL PROTECTED]
250 Ok
rcpt to: [EMAIL PROTECTED]
250 Ok
data
354 End data with <CR><LF>.<CR><LF>
Subject: test
From: "John Doe" <[EMAIL PROTECTED]>
To: "Suzy" <[EMAIL PROTECTED]>
test message
.
250 Ok: queued as 9EE1A64798
quit
221 Bye
Here you have [EMAIL PROTECTED] as Return-Path. Please note the fact that
submitted message does not have such field yet and even if it had, it
would be overridden by the MTA with what I specified in "mail from:"
command.
Because I used telnet, I was able to specify 2 different addresses for
the From and Return-Path addresses, but all the MUAs I worked with have
no such fine grained settings. For Thunderbird, when I say I want to
send mail as [EMAIL PROTECTED], the same address will go also in the
Return-Path.
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