not shared mailbox context) ✓ Works Sending from Outlook on the web ✗ Fails (no rule engine access) ✓ Works (with divider line) Using Ctrl+R to reply ✗ Fails (rules don’t intercept keyboard shortcuts) ✓ Works Sending from Teams email compose ✗ Fails (no rule support) ✓ Works (Teams pulls Outlook signature) ExceptionsThere are three cases where the 'always CC myself' myth is actually correct — but only if you reinterpret 'always' very narrowly. You only send new messages from one account in Outlook desktop : The 'Bcc all messages to:' field (under File > Options > Mail > Send Messages) will work — but only for brand-new compositions， and syncing with modern Exchange servers is unreliable. You’re willing to use VBA : A macro can inject CC logic on Send. But it requires enabling macros globally (a security risk)， breaks with every major Outlook update，。
they don’t — the signature method is your only consistent option.Your SituationBest MethodWhy Outlook 365 or 2019 desktop + multiple accounts Signature with cc: line (per account) Handles replies。
and Teams sync Outlook on the web only Signature with divider line + cc: Web ignores CC lines above the signature divider iOS/Android mobile Manual CC before sending No signature parsing or rule engine available on mobile clients Using Outlook with Exchange Online + strict compliance policies Ask your admin about transport rules Only server-side rules can enforce CC in regulated environments Sending from Outlook + Teams + shared mailbox Signature method — verified in Teams v2.11+ Teams uses Outlook’s signature engine directly 。
never replies or forwards. You’re using Outlook 2007 or earlier : The registry key BccMyself=1 does function — but those versions aren’t supported， forwards， and fails entirely in Outlook on the web. If none of those apply — and for 98% of office.alibaba.com users。
shared mailboxes， The first thing most people do when they want to always CC themselves is create a mail rule under File > Manage Rules nbsp; ✓ Works ✓ Works Replying to a message ✗ Fails (rule doesn’t trigger) ✓ Works Forwarding from a shared mailbox ✗ Fails (rules run under your profile。