Mailwasher - Over 8 million people use MailWasher as their spam filter
Newton Mail - Newton is a fully featured mail client available for Android, iOS, macOS and Windows.
SPAMfighter - SPAMfighter and Microsoft have built the strongest and most effective anti spam filter for Outlook, Windows Live Mail, Outlook Express & Thunderbird
myMail - myMail is the smart email app for managing all your accounts on iOS and Android.
Spam Reader - Spam Reader is a free anti-spam add-on for Microsoft Outlook.
Gmail - Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.