What is an MX record?
source link: https://help.dreamhost.com/hc/en-us/articles/215032408-What-is-an-MX-record-
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Overview
Mail Exchange (MX) records are DNS records that are necessary for delivering email to your address.
In simple DNS terms, an MX record is used to tell the world which mail servers accept incoming mail for your domain and where emails sent to your domain should be routed to. If your MX records are not pointed to the correct location, you will not receive email.
In addition to website hosting plans that include email, DreamHost also offers an email only hosting plan you can read about here:
Most DreamHost customers host their website and mail service at DreamHost. After an email address is added, all the required mail-related DNS records are created automatically.
You can also switch a domain's mail service between DreamHost, Google Workspace, or somewhere else entirely.
Changing your MX records only points where new email is sent and does not migrate old email to the new email hosting company. View the Transferring Emails article for instructions on how to back up your old emails first.
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