Unable to authenticate to SMTP server

[falko]

Originally Posted by ashkev

I am hosting this on our library's server. This is for the public library where I work.

Please ask your library's ISP if they block port 25.

[ashkev]

Originally Posted by falko

Please ask your library's ISP if they block port 25.

We have a t-1 configured for raw internet access.

[ashkev]

Here is some more information. I had a bad MX record in my DNS. Now things look better. I can now send and recieve from inside the Main Library building using an e-mail client such as Outlook (on the same network as the ISPConfig server)
From Outside the building I can recieve e-mails, and I can send to e-mails with the cass.lib.mi.us domain. I still cannot send to anyone other than cass.lib.mi.us e-mail accounts from outside the Main Library.

I suspect that this is some sort of relay setting problem. Can anyone advise me where I can check the relay settings, and what they should be set for in order for me to be able to send to non cass e-mails?

Thanks

[falko]

Originally Posted by ashkev

From Outside the building I can recieve e-mails, and I can send to e-mails with the cass.lib.mi.us domain. I still cannot send to anyone other than cass.lib.mi.us e-mail accounts from outside the Main Library.

Is that the domain that is handled by your server? Then you should enable "Server requires authentication." in your email client. If you don't, and your server uses SMTP-AUTH, you can send only to domains that are on the server, not to external domains.

[ashkev]

I have done that. And I have tried every combination of username I could think of... name....web2_name....name@cass.lib.mi.us.....web2_ name@cass.lib.mi.us. With no luck

[ashkev]

Originally Posted by ashkev

I have done that. And I have tried every combination of username I could think of... name....web2_name....name@cass.lib.mi.us.....web2_ name@cass.lib.mi.us. With no luck

OK, I feel very stupid now. The problem WAS the firewall. I had SMTP set as a proxy service. When I removed that service and put in a straight packet filter, everything worked fine.

Thank you all for your patience with me.