Configuring Your VPS or Dedicated Server as a Mail Server

(This article assumes that you are a current InMotion Hosting Customer. Is that not the case? Let us set you up with the perfect web hosting solution. Many common email providers enforce guidelines and policies for sending/receiving email. Typically, they will publish their acceptable use policies. For example, Google, Yahoo!, and AOL all provide best Read More >

Email Bounce: Retry Timeout Exceeded

Occasionally, you may send an email message that returns a bounce-back message with an error such as the following: This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: retry Read More >

Domain has exceeded the max defers and failures per hour

What is this error? If you are receiving an error similar to “Domain has exceeded the max defers and failures per hour (5/5 (100%)) allowed“ in an email bounceback, it means that outgoing email from your domain has triggered a rule in the server that will stop any further email from going out of Read More >

“550 Invalid address” email error

When working with emails, there are times when you run into different errors and receive your email back instead of it going forward to the intended recipient. Email servers will give you what is known as bounceback information. This information is very useful in discovering why your email was not delivered. There can be several Read More >

How to Fix the 550 No Such User Here Email Error

One common error you can get when sending email is the “550 No Such User here” error. This error occurs when the sending email is rejected because the username cannot be found or is not accessible by the server. There are several reasons why you would get a “550 No Such User Here” error. Mail Read More >

Email Error 450

A 450 email error is typically a temporary routing issue on the receiving mail server’s end. Sometimes these are also Greylisting responses from the receiving mail server used to filter incoming mail. Greylisting is a method of accepting messages a mail server can use that will block the first attempt to deliver a message, and require a Read More >

Email Error 421

A 421 email error is typically a temporary routing issue on the receiving mail server’s end. These should usually be resolved automatically, and you should receive a final bounce-back message if the message completely fails. You usually would not receive a bounce-back message for this type of error. If your message is going to be delayed more Read More >

554 Email Error

A 554 email error is sometimes thought of as a catch-all of email errors. It is generally used when there is a generic delivery failure that another email error code doesn’t directly define a problem for. Some mail servers also use a 554 error even if there is a specific error code that defines what went wrong Read More >