Authentication failed, 535 incorrect

[IllusionMPN]

Authentication failed
535 Incorrect authentication data

THis is what our tech said "That's an smtp auth error, you will either need to disable smtp authentication on your mta or configure squirrelmail to do smtp auth if possbile."

How do I get to edit this file?

 

[nobaloney]

Edit what file?

Generally you edit files with a text editor.

Jeff