GroupsPro lets you manage contacts, contact groups, and create mailing lists for mass email. It is an excellent way to create and organize groups of contacts and create mailing lists. A mailing list contains members of groups or individual recipients.
Create and modify groups of address book contacts
Assign contacts to groups (single and fast assigning)
Create and modify mailing lists for mass emails
Search for names, phone numbers, email addresses, postal addresses, departments and notes within all contacts
Modify your contacts
Compatible also with OS X 10.11 (El Capitan)
Usable within GroupsPro for sending emails to several recipients.
Add text and photos
CC and BCC recipients partially supported
PDF as images or attachments
Message as HTML possible
Send prepared emails manually with the Mail app