Privacy Policy
Last updated October 20, 2026
MailClient is built so your email stays yours. This policy explains exactly what the software and our license server handle.
Your email stays on your PC
The software connects your PC directly to your email providers (for example Gmail or Microsoft 365). Your messages, contacts and attachments are stored on your PC, not on our servers. We cannot read them. Account passwords are kept in Windows' own credential store, and sign-ins with Microsoft use Microsoft's sign-in, so we never see that password.
What our license server keeps
| Information | Why |
|---|---|
| Your license key, the email address and name you bought with, your plan and its end date | To know which license you have |
| For each activated PC: an anonymous ID made from the PC's Windows ID, the PC's name, the MailClient version, the internet address it last checked in from, and when | To enforce the number of PCs and people at a time, and so you can see and remove PCs |
| A short history of license events (activated, PC removed, renewed) | For support and to prevent misuse |
| Download counts of each version | To know how many people have updated |
| If you create an account: your email, a scrypt hash of your password (never the password itself), whether you confirmed the email, and one sign-in cookie | To show you your licenses and send confirmation and password-reset emails (sent with ZeptoMail by Zoho) |
We don't use advertising or tracking cookies, we don't build profiles, and we never sell or share this information. The admin pages use one cookie to keep our staff signed in.
AI features
The built-in rules and the offline AI work entirely on your PC. If you choose the Claude API and enter your own key, the text of the emails it works on is sent to Anthropic under your account and Anthropic's policies. That is off by default.
Payments
When you buy, the payment is handled by the payment provider we send you to (or your bank, for invoices). We keep the invoice details required for accounting, not your card number.
How long we keep it
License information is kept while your license is active and for up to 7 years afterwards where tax and accounting rules require it. PC check-in details older than 12 months are removed. Ask us and we'll delete what isn't legally required.
Your rights
You can ask to see, correct or delete your information, or ask how it's used, by writing to support@rsdware.com. We answer within 30 days. Depending on where you live you may also complain to your privacy regulator (in Canada, the Office of the Privacy Commissioner).
Security
Our server is reached only over HTTPS, its database can't be reached from the internet, it is backed up nightly, and every answer it gives the software is digitally signed, so nobody can pretend to be it.
Children
MailClient is meant for people 16 and older and for businesses.
Contact
Rudra Software Development · support@rsdware.com