Spammers can forge the From address on mail messages so that the spam appears to come from a user in your domain. To help prevent this sort of abuse, most mail servers enable you to add a digital "signature" to the header of mail messages sent from your domain. Recipients can check the domain signature to verify that the message really comes from your domain and that it has not been changed along the way. (If your domain has an SPF record, recipients can also verify that the message came from an authorized mail server.)
If you are using SmarterMail, VCG's hosted mail solution, domain administrators can use the built in tool to generate a 1024-bit domain key that SmarterMail uses to create signed mail headers that are unique to your domain. You add the public key to the Domain Name System (DNS) records for your domain. Recipients can verify the source of a mail message by retrieving your public key and using it to confirm your signature.
Please refer to the VCG User Guide for information on creating a DKIM record.
If VCG manages your DNS record, please contact VCG Client Support for information relating to creating your Domain Key (DKIM) record. If VCG does not manage your DNS, please contact the company that manages it to inquire about creating a DKIM record from your SmarterMail domain account (for domain administrators only), and follow the instructions found in the VCG User Guide for creating the key.
See Also "What is an SPF Record?"
See Also "What is a DMARC Record?"