What you can change
The wording of the mail Sembr sends on your behalf: renewal notices, receipts, invoices, portal invitations, event confirmations, the overdue notices.
Settings, then messages.
Placeholders
Templates carry placeholders that fill in per member: their name, your organization's name, the amount, the date, the link.
Use them rather than typing anything specific. A template with a hard-coded amount in it will confidently tell four hundred people the wrong number.
Preview and test
Preview renders the template with sample values so you can see it as a member would.
Send yourself a test before you rely on it. Reading your own words in an actual inbox catches things that reading them in a form does not, particularly on a phone, which is where most of them will be read.
Who the mail is from
Your organization. Every time.
A member should be able to read every email their organization sends and never once wonder who Sembr is. The organization's name is in the from line and replies reach you. There is a quiet "powered by Sembr" line in the footer, and that is the whole of our presence.
What not to write
Two things worth saying plainly, because they are the mistakes that cost money.
Do not put a real date or amount in the body as text. Use the placeholder. Placeholders are always true; typed values are true once.
Do not add urgency to a first notice. Sembr's defaults are calm on purpose, and they escalate on a schedule. A first overdue notice that reads like a final warning gets you a phone call from someone who paid last week, and teaches everybody else to ignore the third one.
The mail you cannot switch off
Transactional mail goes. An invoice, a receipt, a sign-in link, a privacy-request confirmation. A member who has unsubscribed from your newsletter still gets these, because they are not marketing and withholding them would be the wrong answer.
If you want to control who receives promotional mail, that is campaigns and consent.