Configuring External SMTP Authentication

[MariaSpinosa]

Hello All,

A customer asks us to send our email with a mailbox belongs to his domain. To do this, they require to authenticate to their SMTP gateway with username and password.
We can not go directly from our server to the external SMTP server over internet, so we would proceed passing through Ironport.
How can we reach this target? What is the authentication profile function? Does it allowed to authenticate from Ironprt for outgoing mail?
We are thinking about SMTP Auth with Forwarding) or Outgoing SMTP Auth.

Could you help me please?

Thank you

[marc.luescherFRE]

The authentication profile function allows for SMTP auth on inbound traffic.

Example : external service provider wants to sent and receive email to your users

Possible Implementation : create Exchange or O365 mailbox and enable basic authentication as well as POP3/IMAP4 for mailbox access

                                        create AD user to be used on Ironport for access  validation

External service provider : uses AD user account and password to login into Ironport, Ironport will ask AD for access verfication via LDAP

                                        sends outgoing email to Ironport for processing

                                        receives incoming via POP3 or IMAP4 form Exchange or O365

I hope that helps to understand the SMTP auth use case.