Differences in the message id between IMAPMessage and MimeMessage

Question

Hi,
When I'm getting IMAPMessage from the IMAP server and calling getMessageID() I got next id (for the privacy reasons it not real, but reproduce the differences) :
<[email protected]>
Then, when I saved this message to the disk and read it as MimeMessage and calling getMessageID() I got this :
<20060421154815.XPTL8241.fed1rmmtao11.host.net@[xxx.yy.www.q]>
As you can see the difference is in [] for the string after @.
What could cause to such behavior ?
Thanks.

Answer 1

The first case it clearly split the line into a continuation line.
In the second case I can't imagine why it would remove the angle brackets in some cases but not others.
You didn't say what it looks like in the file.
Also, what version of JavaMail are you using?
What does the protocol trace show when you fetch the message from Gmail and write it to the file?
When you call the getMessageID method, JavaMail gets the Message-ID value from the IMAP
BODYSTRUCTURE response, which the IMAP server creates by parsing the message.
When you call the writeTo method, JavaMail asks for the entire message as a MIME stream.
It's possible that Gmail is parsing the message and "canonicalizing" the data before returning it in
the BODYSTRUCTURE, but returning you the raw message when it returns the MIME stream.
The protocol trace will show us if that's what's happening.