I've seen this a couple times before, usually only happens with
bounced mail. From my understanding the receiving machine isn't
totally RFC compliant, Qmail when it bounces a mail uses the
>From address of something like or some other crazy
address, the receiving server is supposed to accept
Ive been in a long discussion with Virgin Internet about one of their
mail servers not accepting mail with the bounce message below.
Im sending this hoping im not missing anything and the fault is not with
vpopmail as the address is sent as an alias (from mysql table). So,
from the error below
