Specifically the quote at the end about incoming mail from the third-party server coming in through the BTYahoo account. To me that implies that POP3 requests on the BT connection may also be doctored to collect mail from the third-party POP3 server and deliver to the BTYahoo Inbox.Many Webmails offer the facility of amgamating other, POP3'able. a/c's to themselves. And we know that most of those Webmails can be accessed by POP3 from your email client. So it's not surprising that BT also provides this feature.
Just had a look at Hotmail; it's logically equivalent to the BT method described in the BT link that you wot of.
On the Sending side Hotmail shows the From: as "[email protected] on behalf of [email protected]". I wonder if BT gives the game away similarly?
Now that last paragraph eliminates the third-partyy SMTP authentication problem that has been puzzled over.
Assuming this BTYahoo method is doing the same as that hotmail system, then the BT SMTP server is what is actually sending the emails, the third-party SMTP server being ignored - just referenced wherever you found that. In the header perhaps?
So unless BT block several ports, in the way Tiscali used to (or was it Orange?), the simplest solution is to use an alternative port, and the next simplest just to accept using the BT Yahoo SMTP server and ensure the General tab
email and return addresses are set to the third-party ones. As I described earlier.
What do you reckon?
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