Before anything is written, the specialist maps where addresses live: the booking platform, online ordering, the loyalty app, the guest Wi-Fi splash page, gift card purchases and any old spreadsheet from a past event. Each source has its own consent wording, and not every address was collected with permission to market. Those without a clear opt-in stay out of promotional sends, which protects both your reputation and your sending domain.
Deliverability comes first
Plenty of dining rooms still mail guests from a free webmail account or from a sending domain the reservation vendor lends to every restaurant on its roster. Mailbox providers treat that with suspicion. So the specialist puts your restaurant's own name behind the mail: authentication records on the domain of your website, a slow ramp that starts with diners who booked recently, and a purge of stale addresses left over from the grand opening. The big seasonal sends wait until that groundwork shows healthy inbox placement.
The legal basics for commercial mail in America are simple but easy to forget on a busy Friday: a working opt-out link, an honest sender name and a postal address at the bottom of every promotion. Texting diners is a separate matter with tighter consent rules under the TCPA, so phone numbers gathered at the host stand never get reused for texts without that permission.