his is the mail system at host antispam1.3bb.co.th.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
: host 110.164.44.130[110.164.44.130] said: 550 5.1.1 User
unknown (in reply to RCPT TO command)
: host 110.164.44.130[110.164.44.130] said: 550 5.1.1
User unknown (in reply to RCPT TO command)