Customer recently converted over from dialup to broadband… however, outlook express continued to try dialling out using the modem.

The first obvious place to look is in internet options, and make sure the connections tab has the “never dial a connection” setting active (which it did).

OK, I start poking around in OE, as I couldn’t see how it could ignore the internet settings (particularly in the options section, under the connection tab, but it all looked like it wouldn’t use dialup).

I then stumbled upon tools -> accounts -> properties -> connection tab

there was another option to “always connect using:”… and dial-up was selected.

I disabled the option, and OE finally started to work “normally”.