K9
K9 is an email filtering application that works in conjunction with your regular POP3 email program…
18 Alternatives To K9
Airmail
Airmail is a lightweight and lightning fast mail client for Mac.
Boxer
Home · Products · Mods · Liquids · Contact Us · Where To Buy. The Boxer Mod. Featuring a YiHi SX350J-v2 Chipset. Evolv DNA200. and now Evolv DNA75.
FastMail
Email, calendars, and contacts to highest standards of security, privacy and reliability.
Gmail
Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.
Mail Wise
MailWise is an email security solution for businesses.
Newton Mail
Newton is a fully featured mail client available for Android, iOS, macOS and Windows.
Nine
A visual to-do list, cut nine ways.
Outlook
Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Postgrey
Postgrey is a Postfix policy server implementing greylisting developed by David Schweikert.
ProtonMail
Secure email with absolutely no compromises. Get your free encrypted email account today.
SPAMfighter
SPAMfighter and Microsoft have built the strongest and most effective anti spam filter for Outlook, Windows Live Mail, Outlook Express & Thunderbird
Spam Reader
Spam Reader is a free anti-spam add-on for Microsoft Outlook.
Spamato
Spamato is a spam filter system that combines several anti-spam techniques, from which thousands of…
Spamihilator
The free Anti-Spam-Filter Spamihilator removes more than 98% of spam mails before they even get into your inbox.
Spark
Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Tutanota
Get your encrypted mailbox for free.
Yahoo Mail
Web-mail with a terabyte of free storage space & spam protection. Yahoo!