DKIM Setup for FastHosts
Create the Custom DKIM Signature as per the instructions here.
Log in to your FastHosts account.
Click the My Packages button and click the desired domain. Click the Advanced DNS button.
Click the Add TXT Record button under the TXT Records section.
Enter selector._domainkey (replace selector with your selector) into the Host Name. If your selector is smtp2go, then enter the smtp2go._domainkey into the Host Name.
Paste the DKIM Signature, which is created at Step 1 into the Value field.
Click the Save button.