Re: TELNET and SMTP

["Hans-J. Ullrich" <hans.ullrich () loop de>]

Am Samstag 07 Juli 2007 schrieb wymerzp () sbu edu:
> Hello all,
> I'm looking at a client's site and they have unprotected access to port 25
> (i.e. I can telnet to it and issue commands). When I attempt to send an
> email I get this message '553 Relaying is not supported'. My question is

Yes, funny eh ? Relaying is not allowed to prevent spam. Contact the 
postmaster of this system, to allow it for your hosts or for special 
domaines. 

> two-fold: 1)What could I do with the unprotected SMTP access if I can't
> send mail. 2)What purpose do you believe that the SMTP service provides?
> Does the SMTP simply recieve!?!? Thank you all, Zach

Receiving will be allowed for all domaines, this server is responsible for.

Regards

Hans-J. Ullrich
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