[IMP] mail_composer_cc_bcc: corner cases

- Normally a wizard opens on Odoo client side to prompt user to define an email address for partners that don't have one
- But it's possible to bypass it, so we explicitly filter out partners with no email address
- We also return "" instead of "False" for partner with no name, and odoo's tools.formataddr will just use the partner's email address

mail_composer_cc_bcc/models/mail_mail.py

@@ -14,9 +14,7 @@
 
 
 def format_emails(partners):
-    emails = [
-        tools.formataddr((p.name or "False", p.email or "False")) for p in partners
-    ]
+    emails = [tools.formataddr((p.name or "", p.email)) for p in partners if p.email]
     return ", ".join(emails)