Gmail forward filter seems broken when tested by emailing yourself

A test email to the forwarding mailbox never arrives at the destination

Verified 2026-08-20 · Confirmed by 0 builders · Trust 50/100

Cause

Gmail does not deliver a message back to the account that sent it, so a self-sent test of a forward to that same account is suppressed.

Test with a message sent from outside the destination account.

Send the test from a different account or service, not from the forward's destination address.

Affects: Gmail, August 2026

Have your agent know this before it fails

claude mcp add --transport http footgun https://getfootgun.com/api/mcp