Thanks for the answers. As a matter of fact I tried in another mail directory (the mutt one) andit works. Specifically I tried with Tim Ye, which has the same kind of
"First Name" <first.n...@example.com>
as what causes me a problem, and here no problem. So it's a kind of a mystery right now for me. For privacy reason, I cannot provide you with my other folder where the problem arises. Would you have any hints on how I could try to debug this problemĀ ? Have a nice Sunday. Steve