Bugzilla

Hmm, I wonder if these all users have set the pref to use the c++ smtp....
That would seems unlikely. Perhaps some case where the right module isn't (yet) loaded?
From above the call comes through nsSmtpService.cpp which would imply so (and that's completely removed on trunk already.
It looks like nsISmtpUrl could be removed altogether, but there's still *some* usage of it. Bug 1724177 would remove almost all of it I think.

Hmm, I wonder if these all users have set the pref to use the c++ smtp....
That would seems unlikely. Perhaps some case where the right module isn't (yet) loaded?
From above the call comes through nsSmtpService.cpp which would imply so (and that's completely removed on trunk already).
It looks like nsISmtpUrl could be removed altogether, but there's still *some* usage of it. Bug 1724177 would remove almost all of it I think.