Gmail internal Mail Filters

Question

I have a set of filters that auto add emails sent within a particular domain as 'internal'

e.g. if me@example.com sends an email to boss@example.com, it is tagged internal

The problem is, my filter is not truely internal, because say I send an email to person@example2.com and CC boss@example.com, it picks the latter up and flags it internal, but this is not an internal email.

I need to filter emails sent to a particular domain, and only that domain.

Answer 1

(Converting my comment to an answer, as requested.)

I'm afraid that Gmail's filters aren't sophisticated enough for that.

Answer 2

The To: filter appears to pick up cc: as well (and bcc:?). In the advanced search the to: operator does the same (which is user friendly to the masses, but not so helpful when you want more control), but there is also a cc: operator. You seem to be able to use this in the search filter as well. eg:

To: @example.com -cc:@example.com

Which appears to create a filter of the form... to:(@example.com -cc:@example.com). Although the syntax looks a bit wrong, it does appear to filter all the emails that contain an @example.com address in the to: field but not in the cc: field.

However, this is not really a solution since it excludes emails that are sent to @example.com in both the to: and cc: fields. But may be something to work with?

EDIT:

You can perhaps combine the condition when the address appears in both the to: and cc: fields by using/appending something like:

... OR (to:@example.com cc:@example.com)

Although I'm not sure if this can be successfully combined with the above rule?