On Sat, Oct 13, 2001 at 01:13:43AM +0200, Carel Fellinger wrote: > It's very easy to forge From-addresses in email, that's what the line > > Sender = "Sam Varghese <[EMAIL PROTECTED]>" > > in your ~/.muttrc files tell mutt to do. Most MUA (mail user agents) > allow such things. But fortunately most sane MTA (mail transport > agents) fix this by adding a true Sender header. This seems a catch > 42, but Linux wouldn't be unix if there wasn't a way out:) Either add > the user samuel to Exim's trusted users list (which would allow samuel > to forge the From header amongst other things, so NOT recommended) or > use Exim's powerfull header rewriting trickery or login as sam. > > I prefer to rewrite headers in such cases, look at the section > "Address rewriting" in Exim's info files. The trouble with older > exim's (the one in potato) is that the rewriting is a global thing. > Newer exim's allow to specify rewriting rules per transport. You can > easily fake your own special cased rewriting rules per transport for > older versions by having the transport go through a pipe, and in that > pipe have a sed call to do the tranformations you need.
I've noticed that about the version of exim that comes with potato. I have potato on both my workstation and my server - I can't afford to do a dist-upgrade over the web as I pay by the meg for my web/mail. > > True, I log in to my workstation as samuel - should I > > change this to sam? .................................. > > no, why should you? > > > ................... And would it suffice to change the > > username in /etc/passwd and /etc/shadow and then reboot? > > you should fix /etc/group and /etc/sgroup too. And forget about > rebooting, just login afresh if that makes you feel better. I've changed the login but find that I don't have an /etc/sgroup file. Thanks for the reply. Sam -- (Sam Varghese) http://www.gnubies.com