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2. Resend
Sends all automated emails from your system — to landlords, tenants and contractors
Free up to 3,000 emails/month
Resend is the service that sends emails from your agency address on your system's behalf. A typical letting agency sends well under 3,000 automated emails per month, so this is free for most agencies.
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1Go to resend.com/signup and create a free account with your email address.
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2Once logged in, look for API Keys in the left-hand menu. Click it.
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3Click the + Add API Key button.
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4In the Name field, type: MaintenanceOS. Under Permission, select Full access. Click Add.
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5Your key will appear — it starts with re_ and is only shown once. Copy it and paste it in the field below.
Don't close the Resend page before copying the key — once you navigate away, you won't be able to see it again. If you lose it, you can always delete it and create a new one.