The problem you describe as "...those people using BT Webmail, when they reply, have their email replied to the sender ( a generic address) rather that what appeared in the reply field..." is a solid problem for me.
It occurs every time I receive an email FROM a generic address and which also includes a REPLY-TO address-which is ignored.
The only option presented by BT Webmail (and the BT email app) to reply to this type of email, is the FROM address.
The REPLY-TO is not even presented by the email client; it's as though it were not present in the incoming email.
In brief...
The BT webmail client (or app) presents the email once you click on it (as normal).
That screen presents the email with the FROM <generic address> and a TO <recipients address>.
That's all the addresses I am shown.
The REPLY-TO address is NOT displayed at all.
I know there is a REPLY-TO address because on my phone the Mail app displays the REPLY-TO address. If I click the Mail app's Reply to the email, the reply form has the TO address field set to the incoming REPLY-TO address. Exactly as you'd expect it to...
Having spent hours on the BT Messaging Chat explaining this, BT do not seem to understand the basis of the problem.
Complaint raised... hopes not.
