Decide what it is for
Pick one purpose: remind past customers to rebook, share seasonal tips, announce offers, or keep referral sources informed. A clear purpose tells you what to write and who to send it to. A mix of everything leads to a message that nobody finds useful.
Write a one-line promise, for example 'One practical home maintenance tip each month.' Use it on the signup form so people know what they will get.
Build your list the right way
Only email people who agreed to hear from you. Collect addresses from a form on your site, at checkout or the counter, or with a signed paper form. Do not buy lists or scrape addresses from the web. Many countries have rules about commercial email; in the United States the CAN-SPAM Act covers things like accurate sender information, a physical address and a working unsubscribe link. Check current requirements, or ask an attorney, especially if you email people in other countries.
Customers who gave you their address while hiring you can reasonably receive related messages, but give them an easy way out.
Keep a note of when and where each person signed up. If anyone complains, you can show how they joined.
Choose a simple tool
Look for a mailing service with a free or low-cost tier, a signup form builder, a clean editor, list management and unsubscribe handling built in. Importing your list, segmenting by type of customer and viewing basic reports are enough at the start.
Send from a real business address and ask recipients to reply. Replies help deliverability and show you what people care about.
What to write
Lead with something useful, not a sales pitch. A seasonal checklist, an answer to a common question, a short story of a recent job, or a reminder about a deadline all work. Add a single clear next step: book, call, read more.
Keep the subject line honest and specific. A subject that promises something the message does not deliver trains people to ignore you. Aim for short paragraphs and one image at most.
Reuse content you already have. A question a customer asked this week, a before-and-after photo, or a seasonal reminder takes ten minutes to turn into an issue. Write the way you speak, sign it with your name, and avoid heavy design that makes the message look like an advertisement.
Frequency and timing
Monthly works for most small firms, and quarterly can still be worthwhile. Consistency matters more than volume. Pick a day, keep a rough calendar and write two or three issues ahead so one busy week does not break the habit.
Send a test to yourself and read it on a phone before each send.
Measure what matters
Open rates are unreliable because of privacy features in mail apps. Pay more attention to clicks, replies, unsubscribes and the bookings or calls you can trace to each issue. A few unsubscribes are normal and healthy. A sudden spike means the content or frequency missed.
Clean the list yearly by removing addresses that bounce or never engage, which helps your messages reach inboxes.
Common questions
How many subscribers do I need?
Any number. A list of fifty past clients who know you often outperforms thousands of strangers.
Can I add customers to my list automatically?
Not safely without telling them. Use a clear checkbox or a signup form, and say what you will send.
This guide is general information. Search engines change how they work and their guidelines; check Google's current documentation for your situation. Nobody can guarantee a ranking.