You can make your e-mails more secure by activating SMTP authentication for the e-mail accounts in your domain. To do this, you will need to change your e-mail settings.
The changes must be made locally on all devices from which you send e-mails (PCs, notebooks, Macs, smartphones, tablets).
All users of e-mail addresses in your domain (e.g. email@example.com, firstname.lastname@example.org) must make the changes individually and locally on the end devices that they use.
How to change the settings in the mail program on your PC or laptop
A wizard will automatically change the settings in your e-mail program for you.
This only concerns customers who use an e-mail program (e.g. Outlook, Thunderbird, Mozilla, Apple Mail, etc.). Customers who retrieve their e-mails via webmail directly in a browser are not affected.
Follow these instructions:
Launch the wizard from your desktop and select “Go”. A wizard will automatically change the settings for you. You can still select the relevant mail domain.
How to change the settings in the mail program on your smartphone or tablet
This is only necessary if you use a smartphone or tablet to send e-mails from your e-mail domain. In most of the latest smartphones, the settings are automatically installed correctly.