 SteveI know your IP addressConsultant
join:2001-03-10
Yorba Linda, CA
kudos:5 | reply to tomdlgns
Re: DNS - A, MX and PTR records - Silly quesiton When the final mailserver is back up, it can phone home to the backup (via port 25/tcp) and use the ETRN command that essentially says "This would be a great time to scan your outgoing queue", at which time it presumably finds that it can consummate the final delivery.
No out-of-band mechanism required.
Steve
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Stephen J. Friedl | Unix Wizard | Security Consultant | Orange County, California USA | my web site |
