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Re: [slightly off topic] Email problems in HUJI?



On Wed, 24 Feb 1999, Shachar Tal wrote:

> > > it seems like I can send the list, but mail keeps getting refused by
> > > relay (ns.il). can anyone tell me what's going on? I can't update my
> > > domains!
> > 
> > 
> > apparently relay had some software upgraded on it and a config
> > clobbered. it's breaking the SMTP RFC by not replying to an opened SMTP
> > session with a 220 welcome line, hence my Qmail times out on it.

it's even weirder! the 220 greeting line disappears when I telnet port
25 of ns.il and a few others only if doing it from my RHL 4.1 kernel
2.0.30 box, but just fine from anything 5.x (later kernels, obviously)

I wonder what else this screws up, and when that TCP stack bug was
fixed, (or is it in the firewalling rules?) since I haven't seen
anything about it on linuxHQ.com...

so: first line (packet?) of an incoming transmission on an outgoing TCP
session is SOMETIMES clobbered, when contacting specific hosts, but not
others...

I'll compile a new kernel and tell y'all if it solves it. I thank Russ
Nelson for having me try simply telnetting from a different machine, I
never suspected it was a local kernel bug...

-- 
Ira Abramov ;  whois:IA58  ;  www.scso.com ;  all around Linux enthusiast 
                              --  "Of course Unix is a user friendly OS, 
                              it is just very picky about its friends..."