On Tue, 1 Dec 2009, Wolfgang Zeikat wrote:
Benny Pedersen wrote:
postfix reject_unverified_sender does a vrfy
Nope. It opens an SMTP connection and waits what the receiving MTA
answers to "RCPT TO"
Then it closes the connection.
As a side note, among the other many evils of 'callback verification' I've
discovered that if you attempt callback on all the spam with forged yahoo
addresses, you will earn a 'reputation' with yahoo's servers that your
mail should be greylisted because it attempts to 'send mail' to too many
non-existent addresses. One more reason to NOT verify addresses this way.
- Charles
