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cleaner416 09-19-2003 11:32 AM

Sendmail / SMTP Auth

I have set up an RH 9 server that is a mail, dns and dhcp server.

I've got dns and dhcp set up ok but I am having trouble with sendmail and SMTP auth.

I want local users AND external roaming users to be able to sned/rcv mail via SMTP auth (using login to SMTP feature on most MUAs)

I followed the instructions here to set up SMTP auth: and it seems to have gone smoothly. However I keep getting this error when I try to send mail from the MUA:

550 5.7.1 <>... Relaying denied. IP name lookup failed [] is the IP of the local machine, granted via dhcp. Google searches suggest that I should be adding some blcok of IPs to a relay list, but that doesn't make any sense...I want any IP to be able to use this thing as long as they authenticate via smtp auth.

Any ideas?

Many thanks!

cleaner416 09-19-2003 12:21 PM

I got to work by dnl'ing this line:

define(`confAUTH_OPTIONS', `A p y')dnl

I hope I still have a secure sendmail setup???

lenlutz 10-05-2003 11:56 AM

i THINK i may have it working...
and follow it...
it APPEARS to have worked...

da_tibmeister 10-06-2003 11:40 AM

Another fix is to use pmpass, once a user POP3 auths, it will allow that user( actually, that IP) to relay for a certian amount of time. It has worked very well for me for over a year now.


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