SPF and DKIM Setup guide for 1and1
Log in to your 1and1 account.
Click the Manage Domains under Domains section.
Click on the appropriate domain name and click the Edit DNS Settings.
Click the Add Record button under the TXT, SPF and SRV Records section.
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.
To create a DKIM record, click the Create Subdomain link under the appropriate domain.
Enter the Hostname we recommend into the box next to Create Subdomain. Click the Create Subdomain button.
Go to My Domains >> Manage domains and click the Manage Subdomains link under the appropriate domain.
Under the Subdomain Overview, click the drop-down menu for the Subdomain that you created.
Under A/AAAA and CNAME Records section, select the CNAME option. Enter the Value that we advise for your CNAME record into the Alias field. Select the check box for the I am aware disclaimer.
Click the SAVE button.