All messages sent through the site are delivered immediately to the recipient's inbox. There are two ways to confirm delivery and whether your message has been read.
Every time you send a message, the recipient receives an email notification telling them they have a new message on the site. This means your message will reach them even if they do not log in regularly.
To check whether a recipient has read your message, go to your Sent folder:
Against each sent message you will see one of the following:
Messages cannot be deleted or lost. They remain in both the sender's Sent folder and the recipient's Inbox permanently, regardless of whether either party deletes emails from their personal email account.