> On Jun 28, 2016, at 1:46 PM, Zhang Huangbin <z...@iredmail.org> wrote: > > I can reproduce this issue with a simple Python program: > > *) construct mail message with forge sender address. e.g. 'From: > <fo...@forge.com>' > *) send email as normal/legal user "auth_u...@my-domain.com" with smtp auth. > *) while sending email, specify the sender address as > "auth_u...@my-domain.com". > *) When user received the email, his MUA shows the address in 'From:' as > sender.
Here's the python code: http://pastebin.com/Jj7sBxCp