Best practice email marketing delivery including;

• Sender Reputation
• 10 year ISP relationships
• Feedback loops
• Domain Keys
• SPF Records
• Spam checking
• Add to safe sender
• Testing - A/B split, frequency, timing, subject lines, time
  zones, copy, offers etc

 
See also Email Delivery Platform, Best Practice Audits, Best Practice Consulting
 
Best practice strategy
Best practice design
Best practice reporting
Continuous improvement