20 Oct
2003
20 Oct
'03
14:12
The 03.10.19 at 15:20, Claude Fuhrer wrote:
That's the biggest problem of spam. No mail-sending tool can enforce you to specify a valid address as return address. So you can send thousands of message to non-existend address without to receive the error messages...
There is a method that I heard some people use. Every email is checked against a white/black list of senders. If no match is found, an automatic reply is sent to the originator, who must respond to it within a time frame to be whitelisted. Then, the original email is forwarded to its destination. -- Cheers, Carlos Robinson