sendmail putting mails to non-existing hosts into local accounts -


i have problem sendmail, , couldn't find information despite spending hours on google.

on linux server ("myserver.com"), have local users, e.g. users "john" , "mary".

user "john" - through mail client , authenticating correctly on account "john@myserver.com" - sends email "mary@bogus-non-existing-host.com".

sendmail instead of rejecting email, puts same in mailbox of local user "mary".

some configuration in sendmail prevent behaviour?

got answer @ sendmail usenet group: problem caused wildcard cname dns record. sendmail appends hostname of server bogus (unresolved) hostname, , dns lookup, positive if there's wildcard cname record. removing wildcard cname record solved our problems.


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