I am installing a Spam filter and getting an error that says my mail server is accepting invalid email. My mail server is IMail Server 10. Anyone know how to configure it to reject invalid email?
By default is should not just blindly accept invalid emails. There are two things I can think off that could cause this issue.
We urge our clients not to use the wildcard as it causes unneccessary spam to them. Our log is full of examples where we reject emails for addresses that don't exist.
In the past we used a spam filter that sat before imail so it accepted everything. This put huge demand checking virus/spam on all emails. Not we use declude that sits in the middle of imail. Imail now rejects invalid email addresses and we only check this.