howto not accept mails to the not legitimate users on MS Exchange 5.5 ?

['chris']

hi

we have MS Exchange 5.5 running on WIN NT 4.0 sp6a

the following problem:
we are getting dailly in the postmaster inbox tousends of mails to the not existing users.
our Exchange must be setuped to accept all incoming email, regardless of whether there is a legitimate user for it.
howto disable this feature on the smtp side of the Exchange server ?

kind regards
chris

[Igor Karasik · Accepted solution]

AFAIK, you cannot do that with Exchange 5.5.
Only exchange 2003 have "Filter recipients who are not in the Directory" option.

Of course, you can use some 3-th party tools, for example:
http://www.policypatrol.com/PolicyPatrolSpamFilter.htm#Address_verification

No freeware tools exists, therefore moving to exchange 2003 will be good option (especially because exchange 5.5 and nt4 are not supported....)

[Jon Finley]

There ARE some ways to filter some of the incomming emails in 5.5:

http://support.microsoft.com/kb/893518/en-us

General help:
http://support.microsoft.com/kb/836500/en-us

Jon

['chris']

hi john

but relaying is not my problem.

greetings
chris