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Retrieving all emails sent to the domain, without having to specify an e-mail address each time
On your Mail hosting, create what is called a "catchall" address if you wish to receive all messages for which there is no specific e-mail address set up on your domain.
For instance, you use email@example.com but wish to receive e-mails even if the sender gets the address wrong (firstname.lastname@example.org, email@example.com, etc). With a catchall address, a sender getting the address wrong will not receive an error message and you can check corresponding e-mails by logging in to the catchall address firstname.lastname@example.org.
However, we would advise against creating this account because it also retrieves all the spam and viruses; after a wave of spam, it runs the risk of being completely swamped. It is better for senders to receive an error message warning them that the e-mail address they specified is not in use so that they do not continue to use it as a recipient address.
What is more, if you configure an auto-reply function on a catchall@ address on your domain, no automatic reply will be sent to the people sending a message to an address which does not exist on the domain.