How are we supposed to contact you for a legitimate problem? Yahoo's SPF validation failed!!!! How are we supposed to send our emails?
You're joking!? Yahoo7's mail has an INVALID SPF - pretty basic stuff!
That means I can't send an important email. Surely something as simple as this should NEVER occur if you are supposed to be a quality service provider.
This is their email response (edited to remove private details):
"This error occurs when Sender Policy Framework (SPF) validation for the sender's domain fails. If you're the sender's email admin, make sure the SPF records for your domain at your domain registrar are set up correctly. Office 365 supports only one SPF record (a TXT record that defines SPF) for your domain."