SPF and DKIM Setup Guide for 1&1 IONOS

The following guide is relevant for SMTP2GO customers, who have a domain name hosted with 1&1 IONOS.

Step 1

Log in to your 1&1 IONOS account.

Step 2

Click the Manage Domains under Domains section.


Step 3

On the Domain Center page, find the appropriate domain and then click the Panel (v) control for that domain. Click the Edit DNS Settings under Domain Settings section.



Step 4

Click the Add Record button under the TXT, SPF and SRV Records section.



Step 5

Select the TXT option from the Type drop-down menu.

Enter @ into the Name field.

Enter the SPF record that we recommend for you into the Value field. You can find your recommended SPF record from the Sender Domains page in your SMTP2GO App.

If you are interested, take a look at some more detailed information about SPF records here.



Click the Save button.

Click the Save button on Edit DNS Settings page and then click the Yes button on dialog box.

Step 6

To create a DKIM record, select the CNAME option from the Type drop-down menu.

Step 7

Enter the Hostname we recommend into the Prefix field and enter the Value that we advise for your CNAME record into the Value field. Click the Add button.


Step 8

Click the Save button.


You can find the "Hostname" and "Value" under the Settings >> Sender Domains  section of your SMTP2GO Dashboard.

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