RFCs (Request For Comments) are documents intended to describe technical aspects of the internet. They are produced and published by the IETF (Internet Engineering Task Force), a group which basically produces and defines standards. For more information, see: RFC
and Internet Draft
Best practices are recommended methods which are often based on these documents and are intended to advise you on the best way to proceed. In this instance, this means the basic rules to follow so that your emails are not marked as spam.Sending Volume
If your outgoing email volume is very high, you are advised to:
- Reserve an IP block dedicated solely to email usage.
- Provide an 'abuse' address on this block in order to receive complaints.
- Request to configure reverses on all IPs correctly.
This operation will enable you to simultaneously isolate the IP and domain reputation if you send emails for various domains, to receive the complaints, and thus do what is necessary to get unblocked by various organisations. It also enables you to locate a problem more quickly on a form that uses domain X or Y, as the emails are not sent out from the same IP and don't have the same reverse.Email Content
This system will enable you to follow up on feedback provided by some internet service providers directly, informing you that their users have marked your message as illicit, and that it has thus been classified as spam. This will enable you to interact with these ISPs directly concerning your reputation. Some FBLs:Authentication
Some authentication services enable you to protect your reputation.
An email authentication technology developed by Microsoft which validates the authenticity of your domain name by verifying the IP address of the sender. This technology is based on the IETF standard: RFC4406
Sender Policy Framework is a standard for verififying the domain of the sender. It is based on RFC4408 and consists of adding an SPF or TXT field to the domain DNS, which contains the list of IPs authorised to send emails from this domain.
- Reverse DNS
Reverse enables your IP to be "translated" into your domain. That allows the domain associated with the IP address to be found.
This standard is described in RFC4871.
AOL, Google (Gmail) work on this basis. Official website: DKIM