Check the sending domain for DNS errors

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The mail server that sends the email uses the DNS mechanism to identify the destination mail server. Therefore, the sending domain must be set in the DNS server. If a DNS error occurs, check whether the sending domain exists (whether name resolution is possible). In this way, you can identify the cause of the error and take appropriate measures.



How to deal with hard bounces
Next, let’s look at how to deal with hard bounces.



Verify your email address
If an email address does not exist, you need to set mail marketing to doctors it so that it will not be delivered to that address. Repeated delivery to an email address that cannot be reached increases the error rate, and there is a risk that the recipient's server will identify you as a spammer.

It is also important to use an opt-in method. By sending an email and asking for approval when registering an email address, you can prevent incorrect input of email addresses and registration of invalid email addresses. Please take this method and register without making any mistakes in your email address.

In addition, our email delivery system " Arara Message " has a "distribution list exclusion function" that allows you to register addresses you do not want to receive emails from in advance and prevent them from being delivered. Using such a system is one way to go!







What to do if you don't receive a bounce email
If the bounce email is being exchanged between individuals, the From header (sender address) will be "MAILER-DAEMON" and the Subject header will be "Delivery Status Notification (Failure / Delay)" and the email will be delivered directly to the individual's email address.

On the other hand, when sending out mass emails such as email newsletters, the destination of bounced emails may be determined by the settings of the sending mail server (email delivery service). If you cannot confirm the bounced email, there may be a problem with the settings of the Return-Path, which is the destination of bounced emails. The Return-Path is the address used to send back notifications if an error or bounce occurs after receiving the email.

However, if the Return-Path address is incorrect or cannot be received, the sender of the bounced email cannot be identified accurately, and the bounced email will not be delivered. In addition, some mail servers may block bounced emails if the sender domain and the Return-Path domain do not match. This is a measure to prevent spammers from sending emails from spoofing legitimate domains, but it may also happen unintentionally that bounced emails are not returned.

When such problems occur, senders are unable to receive bounced emails and the error is left unaddressed. This results in poor email delivery and poor communication with users, which can lead to lost business opportunities. Senders should set up appropriate email settings, including Return-Path, to ensure that bounced emails are delivered properly.