Hello David, the only negative impact I can anticipate are users like me, using fetchmail since decades without changing anything and then are stuck with a dysfunctional option. In contrast, the new feature has been rolled out on December 17th - so 4 days ago. Who would since then rely on Auto configuration of mailservers being dysfunctional? And what is beneficial from a non functional Auto configuration? If someone can explain - feedback offline is very much appreciated. Need not prolong this bug thread here. Sorry, this significantly exceeds the capabilities of my imagination :-). But take your time to decide .... Take care Dieter