nanog mailing list archives
Re: SMTP spoofing ?
From: "Perry E. Metzger" <perry () piermont com>
Date: Thu, 19 Feb 1998 12:48:03 -0500
John R Levine writes:
Are there any routers currently available that can do port 25 spoofing for dialup users? That is, when the user attempts to connect to port 25 anywhere, he in fact connects to port 25 on your own SMTP server instead. In case it's not obvious, it's for spam management.
It seems simple enough to block all outgoing SMTP to anything but your own server, and to apply such a filter on your dialups. I don't know if the more complex solution you propose is worth it -- the users will quickly learn where they should aim their mail... Perry
Current thread:
- SMTP spoofing ? John R Levine (Feb 19)
- Re: SMTP spoofing ? Perry E. Metzger (Feb 19)
- Re: SMTP spoofing ? John R Levine (Feb 19)
- Re: SMTP spoofing ? Jon Lewis (Feb 19)
- Re: SMTP spoofing ? Miquel van Smoorenburg (Feb 20)
- Re: SMTP spoofing ? Steven L. Johnson (Feb 23)
- <Possible follow-ups>
- Re: SMTP spoofing ? sully (Feb 19)
- Re: SMTP spoofing ? Owen DeLong (Feb 20)
- Re: SMTP spoofing ? Perry E. Metzger (Feb 19)