Differences between the requirements

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If neither matches, refer to the DMARC policy and take one of the following actions: "Do nothing/Quarantine/Reject." *If you are using an external email delivery system (if the sender and sender have different domains), the "DKIM creator signature" will be used for evaluation. Receive the email or send it to the spam folder or don't receive the email Please set the IP address of the mail delivery server (SPF setting), the mail delivery server creator signature (DKIM), and the DMARC policy information in the TXT record of the DNS server that manages the sender address domain.


The information systems staff who manages the DNS server uk telegram database can set up the TXT record of the DNS server. <Setting example: If you do nothing> “v=DMARC1;p=none” *We recommend starting with p=none (doing nothing) when you first implement the service. Not to send unsolicited or spam emails Gmail regularly monitors the spam rate of sender domains. The guidelines state that a "spam rate of less than 0.1%" should be maintained. If the spam rate is high, more emails will be classified as spam, making it harder for emails to be delivered.


Even if the rate is improved, it may take some time for the sender domain to be deemed safe, so it is important to prevent the spam rate from increasing. This is also mandatory for "all senders ," just like authentication of outgoing email . Specifically, you should incorporate the following two points into your operations. Do not send emails to lists that have not opted in to receive emails Maintain an error list We recommend that you assign a number of errors to addresses that have resulted in delivery errors for some reason as a result of email delivery, and not deliver to lists with a threshold number of errors (we use 5 as the threshold).