Originally Posted by damir
42go:Ispconfig 2 and Ispconfig 3 is totally different systems and not compatible with each other. Ispconfig 3 is using sql virtual mail system and not linux username system as Ispconfig2.
You need to use email address as login in Ispconfig 3.
This is going to be a big headache as I am migrating existing websites from a server with 42go and I would have to ask all existing customers to change the POP3 settings in their email client - Not a very clever idea!
Unless anyone knows a fix I will have to consider going back to 42go.