Shamim,

Update… The odd un-forwarded user has now received forwarded mails successfully on their home network so I can only assume he has decided to reply to emails via a browser session or infant stopped using an otherwise PC. The other possibility is that his windows main platform has received adequate updates to be current and naturally eliminated the problem as an update fix.

Who knows but I will keep a close eye on his message activity..

I’ll mark this thread a s resolved.

Andrew