Using client email address?

[DirtyDog]

Or "Consultant" would be an even better term to use.

This.

That's what I always put on my work signature if I have to have a "job title" type field on there.

[d000hg]

B2B stuff is sent from d000hg.com email (invoices, etc). "internal Work email" I use theirs, unless I'm WFH and can't be bothered to log into RDP just to send an email.