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Encrypted Communication

CloudMail supports encrypted communication of your mail clients with servers. There are two options:



This type of encryption uses a secure channel and forces encrypted communication from the beginning. The key is exchanged between both parties and the subsequent communication is encrypted. This method of communication is recommended, because it requires an encrypted connection.

  • IMAP port 993
  • POP3 port 995
  • SMTP port 465


This variant enables encryption of communication on a normally unsecured channel. The problem with this encryption is, that it cannot be enforced and a potential attacker can use a man-in-the-middle attack to modify your communication and remove any encryption request.

  • IMAP port 143
  • POP3 port 110
  • SMTP port 587