Solve common php mail and PHPMailer errors

The content of this article is to introduce php emails and common errors encountered when sending emails using PHPMailer, and to solve these errors. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

In the previous article [How to send email in php? Using PHPMailer to implement ] We introduced the method of using the third-party library PHPMailer SMTP to send php emails. We must know that PHPMailer is a very easy tool to master, but errors will occur from time to time. Let’s take a look at what are the most common errors when sending PHP emails and how we can fix them.

Sender address rejected: does not belong to user

Sender address rejected: now user has this error means the server cannot Authenticate using the details provided. To fix it, check the from form headers and make sure they correspond to an existing email address. If not, make sure to create or change it and the script will start executing. Finally, make sure SPF logging is enabled.

Gmail cannot verify that example.com sent this message

If you see this warning when testing your PHP mail script, it may mean One of the following situations:

1. Your SPF record is not enabled. You can view the steps on how to create it at https://www.hostinger.com/how-to/how-to-enable-or-add-spf-records.

2. Use an email address that does not exist or does not belong to you in the email header. Please make sure to use valid SMTP authentication details.

The email goes to the spam folder

There may be a number of reasons why the email appears in the spam box. Let’s look at a few common ones:

1. Spam themes. Give some examples, such as: "test", "hello", "test", "urgent" or other similar ones. So we make sure to set clear intent in the email subject.

2. Errors from the title usually cause this situation. This is a security measure to prevent email spoofing and scams.

3. You used spam-sensitive words. This category will contain phrases like “offers,” “click here,” “special promotions,” “this is not spam” and other similar words. So you need to try changing the content of your email to see if this is the case.

4. Your mailing list does not have an unsubscribe button. This can also happen if a lot of people label your email as spam. So having an unsubscribe button is a good way to avoid this.

Summary: As long as everyone is familiar with PHP emails and understands the principle of PHPMailer SMTP sending emails, with more practice, you will be able to skillfully use PHPMailer to send emails through SMTP authentication. The above is the entire content of this article, I hope it will be helpful to everyone's study.

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