for email admins
Topics in this area:
email client settings
email clients' configuration examples: Outlook - Outlook 2007 - Outlook 2013 2016 - Mac OS/X Mail - Thunderbird - Zimbra Desktop
email server settings
email servers' configuration examples: Microsoft Exchange Server - Microsoft Office 365 - Zimbra Collaboration
doublebackup app
transparently archives all the received emails
letsmail app
a ready-to-use mx mailserver for disaster recovery and instant email addresses creation
spamstop app
get email authentication information directly in the email subject