Re: gmail users read on...

> 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.