On some emails the "From Address" are shown in blank, please see the image:
Checking on the headers of the emails that show this behavior I see:
Looks like the UTF-8 is not working on the "From:" lineReceived: from netman.individualpool.net ([184.108.40.206]:34528 helo=zlm0.lclbgdzb.com)
by xxxxx.yyyyyyy.zzz with esmtp (Exim 4.93)
for firstname.lastname@example.org; Sun, 31 May 2020 xx:yy:zz -xxxx
Reply-To: email@example.com 2221001, 581
But the decode is working on the subject as MailControl shows:
[Performance Breakthrough] Tribal secret holds key to reversing limpness
Could it be that the UTF-8 email address is set in white on purpose?
Or, the UTF-8 doesn't work on the "From:" address?