webmail blocked

Our webmail https://mail.mcseurope.nl is blocked by Avast

Message URL:Botnet infection.

We have scanned with multiple products and test-sites but no other reports.

Can the false positive be removed?

Kind regards,
Eric

Can the false positive be removed?
https://forum.avast.com/index.php?topic=14433.msg1289438#msg1289438

Will be fixed in next update. Sorry for inconveniences.