Hi all

I am sending a mail form a AIX5.2 system to a exchangse server. I get a return receipt as follows :-

----- The following addresses had permanent fatal errors -----
ITS-TOSG@mycompany.com
(reason: 553 Requested action not taken: mailbox name not allowed)

----- Transcript of session follows -----
... while talking to mail3.mycompany.com.:
>>> MAIL From:<root@HOST1@mycompany.com>
<<< 553 Requested action not taken: mailbox name not allowed

At first blush, it seems your Exchange server has a filter that prevents emails of certain types. Whether that is a junk mail filter stopping it, or some other type of filter whether it is the dash in your name or anything else it could be.

Id check and see what filters are running on the exchange server side.

__________________
My brain is your brain

your root's email address is getting mangled --- root@HOST1@mycompany.com --- too many "@" signs ... edit the "DSfoo.bar.com" line in /etc/mail/sendmail.cf and restart sendmail to make it append the correct domain to your outgoing emails ...

see also "man sendmail" and the sendmail homepage ...