For IONOS Mail Basic and IONOS Mail Business
In this article, you can find information about the IONOS mail servers for setting up your email programs or apps.
Please Note
For an overview with links to step-by-step instructions for the most popular email programs and apps, please see the following article:
Setting Up Email Programs for an IONOS Email Address
| Server | smtp.ionos.com |
| Port | 465 |
| Connection type | SSL/TLS |
Please Note
For email transfer to work between your devices or programs and our email servers, they must support TLS 1.2 or higher. The following programs and operating systems support TLS 1.2:
Microsoft Outlook 2016 (only if all Windows and Office updates are installed)
Microsoft Outlook 2019 and newer
Mozilla Thunderbird 52.0 and later versions
Microsoft Windows 8 and newer
Apple macOS Sierra 10.12.6 and newer versions
Apple iOS 9 and newer
Android 5.0 and newer
IMAP, POP3, what is it?
IMAP and POP3 are methods of receiving email. When setting up your email program, you can choose between IMAP and POP3. We recommend IMAP as the account type for your inbox. Apply the settings from the IMAP column. Learn more about POP3 and IMAP here.
Using the Alternative SMTP Port 587
If your email program cannot connect to the outgoing mail server even though all the details are correct, it may be that access to port 465 is blocked on your network. If this is the case, IONOS offers the alternative port 587.
How to change your email program to port 587:
- Start your email program.
- Go to the outgoing mail server settings.
- Change the port settings from 465 to 587.
Adjust the encryption method:
Thunderbird: Change the encryption setting from SSL/TLS to STARTTLS.
Outlook 2016/2019: Change the SMTP connection type to TLS.
Outlook (Microsoft Office 365): Change the SMTP connection type to STARTTLS.
Gmail App: Change the encryption setting from SSL/TLS to STARTTLS.
Please Note
For Outlook 2016/2019, you need to change the setting from SSL to TLS.
Additional Information
Creating an email account: You have not yet set up an email account with your IONOS product yet?
We show you how to set up your own email address in the following article:
Creating an Email Address at IONOSSetting up your email program: Need help setting up your email program?
You can find our step-by-step instructionshere:
Setting Up Email Programs for an IONOS Email AddressError messages during setup: If you receive an error message when setting up your email program, please read the following article:
Troubleshooting Email Program Setup IssuesHosted Microsoft Exchange: If you are using Hosted Microsoft Exchange from IONOS and would like to access your Exchange mailbox via IMAP or POP, you will need to enter our Exchange server data in your email program. You can find the corresponding instructions in the following article:
Set up Microsoft Exchange® 2019 as IMAP or POP3 account