TK>> Yes. I found out that if there is something in REPLYADDR, Thunderbird
  TK>> shows the from line ok.

  TK>> In this message there should be "123" as my email address.

  TK>> Now using TB v60.

 PQ> Ooh... mmmm...

Indeed.. Now my email address is set to "2:221/360.9999" in this
Thunderbird 60.3.1. :)

 PQ> (Note that I have quoted your 'quote' line to David.  Your 'From' line
 PQ> also read "Tommi Koivula -> David Drummond<123>".)

 PQ> Are you using a JAM messagebase?

Mostly yes. But I see no difference in this matter with squish bases.

 PQ> It's just it's hard to tell since
 PQ> you're using SMAPI.  Johan specifically states that any REPLYADDR magic
 PQ> formatting works in conjunction with JAM messagebase.

Hmm.. Ok..

 PQ> Whenever I had a choice in any/every JamNNTPd configuration I've always
 PQ> turned the REPLYADDR option off (i.e. disabled).

Previously that was my choice too. At least with my JamNNTPD in OS/2.

'Tommi

--- Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:60.0) Gecko/20100101 Thunderbir
 * Origin: *** smapinntpd/linux @ news://fidonet.fi *** (2:221/10.0)