Re: [exim] verify_sender

Russell Robinson wrote:
> If you do an SMTP "rcpt" request against that email address, the spam trap
> server will tell you it's not a valid email address. So, you should not send
> to it, and, of course, you (EXIM) should not receive the email it wants to
> send you.
>

This needs a little bit of clarification that may reduce your need to do
sender callouts for this situation.

A spamtrap will accept everything at RCPT time, otherwise it's very
useless. How else would it accept all spam that comes to it? Some traps
will return 5xx at the end of the data phase, but most will just
silently accept the message as spam with 2xx codes all the way.

Doing a sender callout to this type of email account provides no useful
information.