cannot receive email from mail server installed with postfix
I have installed sendmail 8.12.8-5.90 in my home PC
and it can send and receive email. But I find that
I cannot receive emails from a certain hosts with attachments.
Without attachment, it's okay.
For example, I tried to send a email with a attachement from
one of the trouble server and after a few hours, it bounce back
a mail to me as follows
This is the Postfix program at host emethist.hknet.com.
I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.
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 message returned below.
The Postfix program
Can any one help me to resolve this problem? I really
worry I have lost lots of emails..... need to resolve this
immediately.. Thank you.