I have a user that is not part of the domain (he could be, but he's never on the main network, does not use VPN, etc.) but still needs to access and send emails using the company domain name for which our Exchange 2010 server is authoritative for.
IMAP for receiving mail works just fine, but SMTP for sending mail does not (receive a failure message stating the connection was interrupted). I was able to setup IMAP on multiple Blackberry's, and they can all send and receive fine.
Curious what I need to do to allow this user to access the SMTP server from his Outlook client and send emails.
Ports are allowed and forwarded within the Cisco ASA; firewall within Windows is set to allow SMTP. SMTP service (as well as IMAP) is started. The local ISP actual receives our mail, filters it via a Barracuda, uses LDAP for authentication, and delivers via SMTP.
Do I need to set up a special type of connector?