Mailings cannot reach recipients with comma in their last name

1. Edit your contact to have a comma in the last name.
2. Create a mailing group with your contact.
3. Try sending a test mailing to them.

Instead of

To: "Piotr Szotko,wski" <chastell@devielle>

the To: will look like

To: Piotr@devielle, Szotko@devielle, wski <chastell@devielle>