On Mon, Jan 10, 2005 at 10:30:59AM +0000, Gavin Hamill wrote: > Normally I permit only port 80 incoming to our webservers, but since each > webserver also sends out booking-complete confirmation emails, I would like > to also enable incoming port 25 for those remote mail servers who 'call back' > to check that the envelope sender / HELO address is truly a reachable mail > server. > > I don't particularly want to leave port 25 simply open, but only for those > hosts with whom an outgoing port 25 connection is already established with. If your webservers send out the booking-complete confirmation emails with a correct envelope and header sender, the callback will go to the mail servers and complete there. I don't see the problem here. Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834 Nordisch by Nature | How to make an American Quilt | Fax: *49 621 72739835
