Enabling Encryption (SSL/TLS) in an Email Program

Overview

To enable encryption (SSL/TLS) in your email program, simply do the following:

  • Open the mailbox settings in your email program.

  • Enable SSL/TLS encryption for the mailbox.

  • Use the following ports for the incoming and outgoing mail server:

    POP3 (SSL/TLS): 995
    IMAP (SSL/TLS): 993
    SMTP (SSL/TLS): 465

In the sections below, we'll describe the procedure in more detail for some common email programs.

Please Note

If you are using a different email program, we recommend that you check with the manufacturer to see if that program supports TLS 1.2 or newer. If the email program you are using does not support TLS 1.2 and newer, you will not be able to use it to connect to the email server to send and receive messages after TLS 1.0/1.1 and unencrypted IMAP/POP3/SMTP connections are disabled.

Enabling Encryption in Microsoft Outlook 2016/2019 (Windows)

How to enable encryption in Microsoft Outlook 2016 and Microsoft Outlook 2019 is explained in the following article:

Enabling SSL encryption in Outlook 2016/2019

Enabling Encryption in Mozilla Thunderbird

Instructions on how to enable encryption in Mozilla Thunderbird can be found here:

Enabling Encryption in Mozilla Thunderbird

Enabling Encryption in Apple Mail

How to enable encryption in Apple Mail is explained in the Enabling SSL Encryption section of the following article:

Setting Up IONOS Email Accounts in Apple Mail

Enabling Encryption in an iPhone/iPad

Instructions on how to check your email account settings in an iPhone/iPad and enable encryption can be found here:

Enabling SSL Encryption in an iPhone/iPad

Enabling Encryption in Android

How to enable encryption in the Gmail app or in Samsung's email app is explained in the following article:

Enabling Encryption in Android