Manually Setting Up IONOS Email Acco…
https://www.ionos.com/help/email/microsoftr-outlook/manually-setting-up-ionos-email-accounts-in-outlook-for-microsoft-365/
Log in to your IONOS customer account via the login page. In the product overview, select Email. Click on the IONOS mail plan that you want to configure and choose the email address that you want to set up SMTP authentication for. In the Outgoing mail section, enter the outgoing mail server smtp.ionos.com. Enter port 465 in the Port field and select SSL/TLS in the Encryption method list. Enter the password you assigned when you set up the email address.
Log in to your IONOS customer account via the login page.
In the product overview, select Email.
Click on the IONOS mail plan that you want to configure and choose the email address that you want to set up SMTP authentication for.
In the Outgoing mail section, enter the outgoing mail server smtp.ionos.com.
Enter port 465 in the Port field and select SSL/TLS in the Encryption method list.
Enter the password you assigned when you set up the email address.
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