trouble sending emails

[HEATHER]

In the last few weeks, I started using Outlook (Express
and Outlook 2003). Both will often not allow me to send
an email. Other times, they let me. What is going on?

Outlook 2003 says:
500 Unauthorized relay msg rejected.

Here is the message Outlook Express gives me:
The message could not be sent because one of the
recipients was rejected by the server. The rejected e-
mail address was '(e-mail address removed)'.
Subject 'Form posted from Microsoft Internet Explorer.',
Account: 'pop.thelotusway.org',
Server: 'smtp.thelotusway.org', Protocol: SMTP, Server
Response: '500 Unauthorized relay msg rejected. ', Port:
25, Secure(SSL): No, Server Error: 500, Error Number:
0x800CCC79

 

[Vanguard]

Are you using the SMTP server for the provider to whom you are connected
at the time you try to send? Many ISPs will ban the relay of SMTP
traffic across their network to bar spammers from accessing an
off-domain SMTP server and hide from where they originated their spam.
If you are trying to access an SMTP server that is off the domain of the
Internet provider to whom you are connecting, try authenticating to that
off-domain SMTP server using your username and password of your account
with them.

 

[Guest]

wow, that sounds like a definite possibility.
I wish I understood what you are saying better.
I know I set my pop and smtp IDs using my url (domain
name). I don't think my cable company provides a smtp
server for their modem.
And why does the email sometimes go through to an address
and other times it won't?

 

[Vanguard]

When connecting to provider A, using provider A's SMTP server. Provider
A's network may not let you pass SMTP traffic across their network to
some other provider B's SMTP server; i.e., when on provider A's domain,
use provider A's SMTP server.

If you are travelling, you might be connecting to the Internet using
provider B but still want to send your e-mails from your account at
provider A. If and only if provider B lets you relay SMTP traffic
across provider B's network to connect to provider A's SMTP server then
you will likely be required by provider A to authenticate to their SMTP
server. Otherwise, any joker wanting to use their SMTP server could
send out their spam. If you don't have an account with them, you don't
get to use their SMTP server, especially if coming from somewhere other
than their own network. So authenticate to provider A's SMTP server
when you are coming from provider B's network.

Authentication is almost always required for the POP3 server. That's
the first screen you see of the account's properties in Outlook. Use
the Advanced button to specify that you want to authenticate to the SMTP
server. You can reuse the same username and password that was entered
for the POP3 server, or you can specify separate values (even if they
are the same values as for POP3).