SMTP not so simple?

[Yizit]

I hope this is the right place to post this. If not, maybe one of the moderators can move this to the proper place and let me know.

I purchased some shared reseller hosting and everything is fine except for 1 item: Their SMTP server refuses to accept outgoing mail using the typical mail.accoutname.com. I've tried authorization and I do POP before SMTP but nothing works. The Hostmaster is a bit "green" but, overall, it's a pretty decent package.

There is one out-of-the-ordinary things I wanted and I mention it here in case it has some influence. I wanted the reseller URL to be a dot com and the custom nameservers to be a dot net. For example: reseller account URL = reseller.COM and nameservers = ns1.reseller.NET and ns2.reseller.NET I own both domain names and I do know how to set up a DN as a nameserver with my registrar.

Can anyone give me a clue that I might pass on to the Hostmaster?

Thanks.

[lammert]

The SMTP server is probably blocking all requests with mismatching domain names to prevent inwanted relaying through the server. Basically that is a good setup. The way to add your domain name or IP to the list of accepted domains for relaying depends on the SMTP server. Do you have any idea what type of SMTP server they use, i.e. qmail, sendmail, postfix, exim or something else?