SendGrid → MailKit: a hard email migration across two systems at once

A switch-over plan with no double-send window — and why API keys must not live in appsettings.json.

Author

BARTOSZ SZCZEPAŃSKI

Reading time

8 MIN

Revision

2026.05.07

The full text of this entry is coming soon.

.NET software architect. I design systems for railways, banking and industry — and write about them here before they forget themselves.