One of the new features in the brand new release 8 of IBM's Lotus Notes an Domino is the SMTP outbound authentication (SMTP AUTH) to relay hosts. Most of the ISPs only allow authenticated users / server to relay mail thru their server. To setup this new feature follow these
Ever wanted to get rid of Outlook ? DavMail is a POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client (e.g. Thunderbird with Lightning or Apple iCal) with an Exchange server, even from the internet or behind a firewall through Outlook Web Access. DavMail now includes an LDAP gateway to Exchange global address book and user personal contacts to allow recipient address completion in mail compose window and full calendar support with attendees free/busy display.