On 2018-02-23 (02:15 MST), saqariden <saad.aqari...@ac-montpellier.fr> wrote: > > our mailing service is not for external use, So the users are not supposed to > send or receive B64 encoded mails.
I've never seen anyone *intentionally* sent base64 mails (I mean, people, not spammers). That is a decision made by the MUA. Sounds like you may be trying to solve the wrong problem. -- I've got a sonic screwdriver! Yeah? I've got a chair! ... Chairs *are* useful.