We are currently applying some upgrades to our mail platform to improve the service that we are able to provide. In order to ensure that your mail service runs smoothly during these improvements, there are some changes you will need to make sure are completed in your mail client if you have not already done so.
Our support team has written a series of step-by-step guides that you can follow for most major mail clients - such as Outlook and Windows Mail:https://www.heartinternet.uk/support/article/changes-to-smtp-ports.html
If you are using a mail client that is not included in this article, or if you have followed the instructions there and are still experiencing issues, our support team are on hand to help. You can get in touch with them through your Heart Internet Control Panel.