Sometimes, email errors can occur when you do something wrong, such as misspelling your email address, or you may receive a bounced email with an error due to some server issue.
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So today in this article, we’ll walk you through the most common email error categories, how they occur, and what you can do to get your emails delivered again.
What Do SMTP Error Codes Look Like?
Email error notifications appear phone number database in the form of status codes. And the syntax of a status code is usually a 3-digit number that gives more details about the type of problem encountered.
The first number in the code is the class, usually 2, 4, or 5. This first digit gives you some general information about whether or not:
2 – Successful
4 – Temporary failure
5 – Permanent failure
Related Content: What is SMTP?
Email Error Code Categories
1. 2XX (Successful)
Success here means that DSN (Delivery Status Notification) reports successful delivery.
Although 2XX is referred to as an a we simply couldn’t afford paid error code, when you see codes 200-299, you have actually been successful and the message did not encounter any issues with the mail servers during the delivery process.
2. 4XX (Temporary Failure)
Codes between 400-499 are considered temporary error codes, even if the email is not delivered, it may be delivered if you try again later.
The error code comes in the non-delivery response of the report. If the same mail is sent in the future, it may be delivered successfully. These codes usually force the mail transfer agent (MTA) server to queue the message until it is delivered successfully or times out; typically the value can be anywhere from 1 to 5 days.
You can think of 4XX errors as afghanistan business directory an email that didn’t go through correctly, but there may still be a chance it will be delivered later.
3. 5XX (Permanent Failure)
Email error codes 500-599 cannot be resolved by sending the email in the same form it was originally sent in. In order for a successful delivery to occur, some adjustments must be made to the destination or the mail itself. A change to the MTA (Mail Transfer Agent) server will not leave the message in the queue, but instead delete it from the queue and send you back a “Not Delivered” response error.
In most scenarios, 5XX errors mean that something went wrong and the email was not delivered to the specified email address.
Email Error Solutions
1. 4XX Errors (Temporary Failure)
When a sender tries to send an email, the sender’s email client first connects to the sender’s mail server over the Internet and then forwards the message. When the recipient’s email server accepts the email, the email reaches the recipient’s inbox, where it can read it.
However, this transfer process can be hindered by temporary issues like email limit reached, inaccessible email servers, DNS errors, and more. The email error code number will show you the exact reason.
- Reaching Email Limits
When you send an email, a connection is usually made to your mail server. Most mail servers have a limit on the number of connections allowed to. An email account. The limit is set to combat spam or abuse. When someone tries to exceed this limit, a temporary email error like 451 is generated.
So what is the solution to this situation?
You can contact your email service provider’s customer support to check the limits and increase the limit on the mail server if the limit is set too low.
- Domain Name Errors
Domain name errors can occur when the recipient’s mail server cannot verify whether the recipient or sender is legitimate. If the sender’s IP does not resemble a legitimate server, email delivery will not occur.