Topic: SMTP Authentication

[dave]

All,

I have recently found that I've been listed as a spam source.  The only reason I can find for that is the entire block of IP addys my ISP owns has been listed.  I've tried to send email through my ISP SMTP host and a failure notice was sent back saying the host requires SMTP authentication.

I have looked around online here and see this is an issue thats come up many times and that Qmail doesn't support it - qmail can be modified but requires a development environment, some source mods and other work that I'm not in a position to do right now.  One other message (I think it was from Charlie Brady) suggested using an SMTP proxy.  Something like installing the proxy, pointing SME's qmail at that proxy and have the proxy authenticate to the ISP's SMTP server.

Here's the question:
Has anyone tried using an SMTP Proxy that can do SMTP authentication?

I've looked around on Google and find many references to something that seems to authenticate to POP before SMTP but I don't think this would be what I want.  I don't need my users to do any custom authentication, we all use webmail and that's good enough.  I've looked for other SMTP Proxy software and there are some but I've not found one that looks to be directly compatible with SME.

BTW:  I'm using 5.5.  Once 6.0 releases, I'll probably make that switch but I'm holding out until then.  

Thanks for any input...
Dave

[Dan Williamson]

Yes. Qmail works well with ssmtp-front, cvm-unix, and can provide secure RELAY vy validating users.

One thing though, it may be that the cvm-unix module cannot validate user names larger than 12 characters. Not positive though. Anyone else know for sure?

In the meantime maybe someone can remind me of where to go to get the applicable files for the secure smtp relaying?

[Bill Pflaumer]

Try http://www.pagefault.org/code.shtml.

Bill

[dave]

Thanks for the input.  I was hoping for a 'do this then this' kind of answer and it doesn't look like there is one.  I think I'll have to set up a test box anyway, I had taken the current test box and reformatted it for RedHat so I could play with Oracle on RH.  I can probably scrounge enough parts to put together another one and do some testing with this.  I'll need it anyway when I migrate to 6.0.

I'll start looking closer at the issue this weekend.  Whatever I come up with, I'll post the results here.

[dave]

Dan,

I think maybe my initial post was misunderstood.  I do NOT need to do additional validation for my users.  I need to be able to authenticate to my ISP's SMTP server and relay outgoing mail from my network through my ISP.  I need outgoing SMTP authentication, not incomming SMTP auth.

Can you tell me if ssmtp-front or cvm-unix will allow me to authenticate outgoing SMTP connections?  If not, is there another contrib that will?  I looked further this weekend for a SMTP proxy that says it'll work with QMail and I didn't find anything (actually, I found several, but none that was a binary package that's compatible with and will work with Qmail).

Thanks,
Dave