Woody Kee wrote:

I have problem when I reply my mail it always say it reject from mail
server.

This may be because you are not properly authenticating to the outgoing
server. What type of account are you using?

I try to investigate for this problem and I found that there
are hyphen cover the external email address when I double click at
email address, for example ' (it should be
instead (i think)) but internal doesn't has hyphen
cover.

Those are apostrophes, not hyphens. They are not significant in the field
where you are seeing them because you are seeing the display name for the
address. Open the original message, double-click the From address and you
should see the real address in the dialogue box.
--
Brian Tillman