Starting from June 08, all our customers are enhanced using Dkim signature to prevent email spamming. For those customers that are not opt-in, you should have received a notification in your email account. We provide free upgrade during the next 2 months, after which, non-DKIM email servers will be blocked and suspended.
For more information about DKIM, please read the following.
DomainKeys Identified Mail (DKIM) is an email authentication method designed to detect email spoofing. It is a way to sign and verify email messages at the message transfer agent (MTA) level using public and private keys. The public keys are published in DNS TXT records. DKIM authenticates the source and its contents.
From a high-level point of view, the sender signs the message, both headers and content. The owner of the private key is the only one who should be able to create this signature. The receiver then extracts the signature from the headers, queries DNS for the public key and checks the validity of the signature. Because the data is stored in the DNS servers, only the rightful owners of the domain should be able to set up the public/private key pair and publish the public key.
The detailed specifications of DKIM can be found in RFC 5585.
Saturday, June 9, 2018
