> Counterpoint: I know of a 20person company that ran off google apps and gmail (under an owned domain) Yes, using your own (or your company's, or your school's) domain name is fine - even with hosted email services like GMail and Yahoo Mail. (In fact, if Yahoo Mail users choose use their own domain name - rather than "@yahoo.com" - then the email that they send won't be subject to DMARC.) It's just the "@yahoo.com" or "@gmail.com" domain name that looks unprofessional. Ross.