Mac Apps for E-mail Software

Signature Randomizer

Free

select random e-mail signatures

Outlook Exchange Accounts Optimizer

Trial version

Ensures your Exchange mailbox never gets full.

Encrypt Mail

Trial version

Easily send encrypted e-mail and encrypted attachments.

MacUncle PST Converter

Trial version

Convert PST files to commonly used file formats such as EML, MSG, MBOX, HTML, MHT, ICS, vCard.

Apple Mail Server Update

Free

Improve reconstruction of mail database files.

Aryson Mac MSG Converter

Paid

Convert MSG files into multiple file formats or email clients on the macOS.

Mail Designer

Trial version

Send irresistible invitations to friends, vital updates to business colleagues, and attractive newsletters to any and everyone.

eMail Address Extractor

Trial version

Extract valid e-mail addresses from virtually any kind of text file.

MacUncle EML Converter

Trial version

Convert the EML File to another file format

Missing Socks Mail Free Trial

Trial version

Send anonymous e-mail or e-mail from any address.

Delete2Archive

Free

Restores the ability to use the delete key to archive Gmail messages in Mavericks.

SpamSweep

Trial version

Bayesian spam filter and mail checker.

Tab for Gmail

Paid

The ease and simplicity of Gmail, in your menubar.

Mailvita MSG to EML Converter

Trial version

Convert MSG files to EML files format.

eM Client

Free

Manage your emails, calendars, and contacts and sync with Gmail, Outlook.com or any other service.

Magellan

Paid

Multilingual email client

Mail Perspectives

Trial version

Collapse Apple Mail into compact windows that don't take away your focus.

Mailings

Trial version

Send and track personalized messages.

MailHub

Trial version

Revolutionize email management.

MBOX Breaker

Trial version

Split your existing MBOX files into smaller files of any size.

Mail Designer 365

Trial version

Create HTML e-mails and newsletters without any HTML coding.

Mac PST Converter

Free

Convert PST to EML, EMLX, MSG, MBOX, PDF, HTML, TXT. on Mac.

Graffiti

Trial version

Make your e-mail signatures stylish.

DockStar

Trial version

Mail notifications in the dock, menu bar, and more.