Hi Rafael, Long time ago you have reported this problem in bug-mailfromd list [1] and it was diagnosed as a bug in Mailutils. I am pleased to inform you that this is finally fixed in mailutils commit 58110bef96 [2]. I also would like to apologize for the unusually long time it took to be fixed: that was due to a wide range of factors, mostly beyond my control.
Best regards, Sergey [1] http://mail.gnu.org.ua/mailman/listarchive/bug-mailfromd/2018-04/msg00027.html [2] https://git.gnu.org.ua/mailutils.git/commit/?id=58110bef96c57f5bb2be743c7ef6228aaefa40f2
