I have been hosting multiple domains for httpd on one server for several years. I now want to add email for several domains. I am using Sendmail. Web articles I've read have given me config information, e.g.:

/etc/mail/local-host-names
/etc/mail/virtusertable
/etc/mail/genericstable
One of the sites even shows an image of setting up an Outlook client with the user name sales@domain1.org, complete with password: http://www.ait.com/wp-content/upload...ft_outlook.png.

What is missing from all these how-to sites is how it authenticates the user and PW. Where are the "sales@domain1.org" user name and password stored? Not in /etc/passwd, right?

So, no LQ experts out there on this topic?

sendmail will accept mail for the virtual domains and users configured in the appropriate files.
In order to authenticate virtual users you'll need to use the imap server.

Take a look here for a sendmail/dovecot setup.

Thanks for that feedback. I have experience with the Dovecot IMAP server. It will be a week or so before I can experiment with setting this on on this server. I'll post result when I do that.