webmail AUTH problem
I'm having problems with Tiki's Webmail feature. I'm using tiki 1.7.4 on WinXP, running XMail server, domain is "localhost". I've set up three accounts via XMail for testing. In tiki, when I click on the Webmail link, I get "Error: 4" and a link to click for settings. The link takes me to the setup to add new accounts. So I add all three Xmail accounts, and select one for default. But I still get the same error. When I try to send an email, I get the error "AUTH command failed: Authentication failed". I've tested the email functionality using the Uebimaiu email client, and it works fine sending email back and forth between the accounts. I'm using "localhost" as both the POP and SMTP server names, and the default port numbers. I've tried switching SMTP authentication on and off. I've tried the fix of switching from SMTP to MAIL to use Apache's mail function. I don't get an error, but I don't get a confirmation message that the email was sent, and indeed, it's not. I suspect there's a simple solution, but I don't know enough about mail servers/clients to know where to start looking. Any help would be appreciated.
Thanks!
Mitch