If you put a diacritic char, like è or ë, in the -f tag, you will get a strange "from" line in the email.
This is the command line:
blat test.txt -t email@example.com -from "Daniël Krol <firstname.lastname@example.org>"
The "from" line in the email looks like "=?ISO-8859-1?Q?Dani=EBl=20Krol=20 [email@example.com]".
I've tried this with different blat versions and with different servers.
Does anyone know how to solve this?