OK, we should solve this calmly…

First of all, few questions:

1.) What e-mail client are you using ?
2.) What settings were changed that affected your ISP (I really don’t know what should be changed in your e-mail account settings that invokes problems with your ISP)
3.) What exactly software they are using as ISP ? What is that that conflicts with avast! ?

As much info we get, twice as much help you can expect… :wink:

Cheers !