PostGrid has been great for automating our insurance mails for our client
Polymail Sequences - Simple, powerful multi-stage email campaigns
Lob - A simple API to integrate print & mail solutions into your applications.
Drip Scripts - Create automated email sequences in 60 seconds
Postalytics - Automated direct mail software that’s faster, smarter & better. Postalytics sends personalized direct mail from your CRM and analyzes delivery & response.
MailChimp Snap - Send simple, photo-based email campaigns from your phone.
Growmail Automated Direct Mail - Growmail enables businesses to send letters and postcards instantly through Automated Direct Mail.