Using Email Address Formats as Usernames for SMTP Authentication

Applicability

This solution is applicable only for SMTP sending services and is not supported for Outbound API usage.

Problem

Some applications require usernames to be in the format of an email address, which may not align with the standard formatting of DuoCircle credentials.

Solution

For systems that require an email address format for the username, users can append @outbound.mailhop.org to their regular DuoCircle username. This modification allows the application to recognize the username as an email address.

Steps to Implement:

1. Modify Username: Add @outbound.mailhop.org to your existing DuoCircle username.
   Example: If your original username is user123, modify it to user123@outbound.mailhop.org.
2. Authentication Process: During the SMTP authentication process, the @outbound.mailhop.org suffix will be automatically removed from the username before checking for authentication. This ensures that the authentication process remains secure and effective, while accommodating the format requirement.

Note: This solution only works for SMTP sending. It does not apply to our Outbound API (api.outbound.mailhop.org), where usernames must adhere to the standard formatting specified for API usage.