Outlook
File, Account Settings, more settings, outgoing server. SMTP host 127.0.0.1. Port 2525. Keep writing in Outlook.
Keep your inbox
Stay in your mail app. We cryptographically seal the email.
Write the way you already write. Bold, centering, Send. Outlook, Apple Mail, or Thunderbird. On the office computer that runs Signet7, outgoing mail goes through 127.0.0.1 port 2525. Same on Windows, macOS, and Linux. The unsigned helper cryptographically seals that exact message, then forwards it. If it cannot stamp the message, it does not send unsigned unless you choose that once. That helper is Signet7 desktop. Incoming checks are the other job in the same window. Windows may warn; this is not Authenticode. Checking stays free.
Apple Mail
Add Other Mail Account (IMAP). Then Mail, Settings, Accounts, Server Settings, outgoing. SMTP 127.0.0.1 port 2525. Keep writing in Mail. Full steps: Docs.
Thunderbird
Account Settings, Outgoing Server (SMTP), Add. Host 127.0.0.1, port 2525. Use it for the company inbox only.
This hop never leaves the computer. Real TLS is to your provider after Signet7 forwards. Leave the unsigned helper running or port 2525 goes quiet. Not Exchange. Not a mail vendor. Not Authenticode. Living stories: send and receive.