Answering an Email with send-as without changing subject send's mail with original subject

[mniehren]

Hi,

problem can be reproduced as follows:

• Take an mail, for which you have send-as permissions and push button reply.
• so you see an new mail with the subject "Re: "
• if you now send the mail, the receiver got the mail, but with the without the "Re: "
• if you manually change the subject to "Re: ", it works