Mike Kenny wrote:
I hope to use this to cut down on spam and phishing attempts, because
I could identify legitimate mail by virtue of having the correct
sender address (or at least domain) and recipient. That is, mail from
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> to the
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> is very likely mail
from my bank, but mail from [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> to that same address
is not. Likewise, mail from [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> to [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
is invalid.
Won't greylisting fulfill most of the requirements here?
No. greylisting will not block mail from real MTAs that retry, unless
they have been block listed in the meantime.
