When you use the FILENAME EMAIL access method with the EMAILAUTHPROTOCOL=LOGIN option, SAS follows a specific order to determine which credentials to use when authenticating to the SMTP EMAIL server.

If your site uses “EMAILID=” and “EMAILPW=” with explicit intent to authenticate to a secure SMTP EMAIL server with those credentials, using the “IGNOREFROM” SAS registry key in the SAS registry changes the credential order to accomplish this process.

See Sending E-Mail through SMTP for information about the order of what credentials are used.

Default Credential Order — SAS^® 9.4M9 (TS1M9) and Earlier

1. ID= (and PW=) in the EMAILHOST= system option
   If specified, SAS uses this user ID for SMTP authentication.
   
   
2. FROM= in the FILENAME statement
   If you do not provide ID=, SAS uses the user ID from the FROM= option.
   
   
3. EMAILID= system option (and EMAILPW=)
   If FROM= does not specify a user ID, SAS uses EMAILID=.
   
   
4. operating system user ID
   If you do not provide any of the above, SAS uses the OS account running the SAS session. 

Credential Order After Setting the IGNOREFROM SAS Registry Key

1. ID= (and PW=) in the EMAILHOST= system option
   If specified, SAS uses this user ID for SMTP authentication.
   
   
2. EMAILID= system option (and EMAILPW=)
   If FROM= does not specify a user ID, SAS uses EMAILID=.
   
   
3. operating system user ID
   If you do not provide any of the above, SAS uses the OS account running the SAS session.   

Additional Resources

• Configuring Your Registry: Configure the IGNOREFROM SAS Registry Key for Sending SMTP Email
• SAS KB0040568, ""How to set up your SAS^® installation to communicate with a Secure SMTP Server"