I'm trying to use a mail filter appliance with a qmail/vpopmail (gentoo)
install and am running into a issue with the filter generating excessive
email accounts due to the way qmail handles invalid email addresses.
I'm familiar with the chkuser 2 patch and have tried it with little
success. I am using TLS on my system and the chkuser patch works
exactly one time then begins rejecting even valid addresses. The vendor
that makes the filter suggested using SMTP_VRFY but I'm unable to find a
way to implement this in qmail/vpopmail.
Can anyone here point me in the right direction?