[MlMt] NUL character warnings (v5246)

[Sherif Soliman]

S
> On May 19, 2016, at 6:39 PM, Scott A. McIntyre <mailmate at howyagoin.net> wrote:
> 
> Hi,
> 
> For the last few days I've been getting a LOT of these:
> 
> Server response: “I71 NO Message contains NUL characters”. Command attempted: “I71 APPEND "INBOX.Sent Items" (\Seen) "20-May-2016 08:01:30 +1000" {696+}”.
> 
> The IMAP server is FastMail, but the problem only started happening after a recent update in the last week.
> 
> I had this issue in the past, and I know roughly how to fix it, but, not really sure what's repeatedly causing it.
> 
> Anyone else seeing this?
> 

Yes, I got it at least twice in the last few days. Also with FastMail. It happened when I would try to send a message. 

Quitting and relaunching MailMate fixed it and allowed the message to be sent (I think I had FastMail open in the browser in the background and could see that the message was sent only after relaunching).

Sherif