[qmailtoaster] I think it is issues for qmail-toaster-1.03 to falsify sender to send mail to local domain ,I think it is a security bug.

[camelliu]

I think it is issues for qmail-toaster-1.03 to falsify sender to send mail
to local domain .I think it is a security bug.

Which way to fix it?

When I send email by email client such as outlook .

I setup a falsify account and incorrect password and do not check my server
requires authentication option.

I can send email to a correct email address in local domain.

I think it is a security bug.