Then, try testing our other port numbers. We recommend using port number 8025, 587, 80 or 25 with TLS. Here are some of the most common email delivery errors that we see, and how you can resolve them:Ĭonnection Timed Out– First of all, check that your firewall isn’t restricting your emails from being sent. Once an email has been hard bounced, it is also called a “rejected email”. If you find a hard bounce that you think may work again, you can unblock it from the ‘ Reports > Suppressions‘ page in your SMTP2GO control panel. A soft bounce may be caused by a temporary issue with the recipient server, for example, if their DNS server is down, or their mailbox may be full.Įxample of a hard bounce: The email account that you tried to reach does not existĮxample of a soft bounce: Recipient address rejected: Mailbox fullĪ bounce is a final result for an email, so regardless of whether it’s a soft or a hard bounce, our servers will not continue attempting to send the email. An example of a hard bounce is an email sent to an invalid email address. A hard bounce is a permanent error and a soft bounce is a temporary one. To start off, it’s important to know the difference between a hard bounced email, and a soft bounced email.

We’re here to clear up some of the meanings behind the most frequently occurring email delivery errors so that you can improve your sending in the future. These errors can be extremely helpful in figuring out why your emails have bounced or have been rejected. Have you wondered what your email delivery errors mean?

Surgemail smtp relay