The sticky note offends correctly, and Gmail ships the legitimate arrangement it deserves replacing with: delegation, plus two structural alternatives per how the sharing really works day to day.

Delegation, the direct replacement: Settings, See all settings, Accounts and Import, then Grant access to your account in its section, adding the assistant's Gmail address. They accept the emailed invitation and your mailbox appears in their own account switcher, readable and answerable from their own sign in, no password shared, sent replies marked as sent by them on your behalf per your delegation settings. Their access rides their own credentials and security, revocable from the same settings line the day the arrangement ends, the properties the sticky note lacked entirely. The boundaries worth knowing: delegates read and send while chats, settings and password stay yours and consumer Gmail permits the small handful of delegates a person actually needs.

The structural alternatives when the sharing is really about a function rather than your mailbox: a Google Group configured as a collaborative inbox gives a shared address, orders@ or support@ style, where multiple people take and resolve conversations with assignment, the arrangement that scales past one assistant and keeps your personal mailbox personal. And targeted forwarding, filters routing specific senders or matters to the assistant's own address, suits the narrow version where they handle one supplier or one topic rather than the stream.

The transition ritual matters as much as the destination: delegation granted today, the sticky note destroyed today and the password changed the same hour, since every past holder of a password keeps it until it changes, plus two step verification turned on while you are in the security neighborhood, the arrangement's dignity completed.