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Updating Your Email Settings to TLS 1.2 for IMAP, POP3, and SMTP

Both unencrypted access and access via the outdated TLS 1.0 and TLS 1.1 encryption protocols no longer meet current security standards. To protect your email communications, we will permanently disable these accesses to our email servers between 25/04/2023 and 16/05/2023.

Please ensure that encryption (SSL/TLS) is enabled in your devices and/or email programs by 25/04/2023. Below we have summarised how to enter the correct settings for some of the most popular email programs.

In order for the transmission of emails between your devices or programs and our email servers to continue to work after deactivation, this must also support TLS 1.2 or higher.

Programs and Operating Systems That Support TLS 1.2

  • Microsoft Outlook 2016 (only if all Windows and Office updates are installed)

  • Microsoft Outlook 2019

  • Mozilla Thunderbird 52.0 and newer versions

  • Microsoft Windows 8

  • Microsoft Windows 8.1

  • Microsoft Windows 10

  • Microsoft Windows 11

  • Apple macOS Sierra 10.12.6 and later versions

  • Apple iOS 9 and newer

  • Android 5.0 and newer

Please Note

If you are using a different email program than those listed below, we recommend that you check 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 later, you will not be able to use it to connect to the IONOS email servers to send and receive messages after TLS 1.0/1.1 and unencrypted IMAP/POP3/SMTP connections are disabled.

Overview

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

  • Open the email settings in your preferred 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

You can find more details about how to make these changes for some of the most common email programs below.

Please Note

If port 465 does not work in your email program, you can use port 587 in conjunction with STARTTLS encryption. If you cannot select STARTTLS in your email program, please use the TLS protocol. If this protocol is also not available, enable the Encryption option.

Enabling Encryption in Microsoft Outlook 2016/2019 (Windows)

You can find more details instructions on how to enable encryption in Microsoft Outlook 2016 and Microsoft Outlook 2019 in the following article:

Enabling SSL Encryption in Outlook 2016/2019

Enabling Encryption in Outlook for Microsoft 365

You can find out how to enable encryption in Outlook for Microsoft 365 in the following article:

Enabling SSL Encryption in Microsoft Outlook (Microsoft 365)

Enabling Encryption in Mozilla Thunderbird

You can find more details instructions on how to enable encryption in Mozilla Thunderbird here:

Enabling Encryption in Mozilla Thunderbird

Enabling Encryption in Apple Mail

You can find more details instructions on how to enable encryption in Apple Mail in the Enabling SSL Encryption section of the following article:

Setting Up an IONOS Email Account in Apple Mail

Enabling Encryption on an iPhone/iPad

You can find more details instructions on how to enable encryption on an iPhone/iPad here:

Enabling SSL Encryption on an iPhone/iPad

Enabling Encryption in Android

You can find more details instructions on how to enable encryption in the Gmail app or Samsung's email app in the following article:

Enabling Encryption in Android

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