Docs
Search syntax
mail_search searches every account the key can reach and merges the results newest first.
Operators
from: to: cc: subject: has:attachment is:unread is:read is:flagged in:inbox|sent|drafts|trash|archive|spam in:<folder> after:YYYY-MM-DD before:YYYY-MM-DD newer_than:7d older_than:30d larger:5M "exact phrase" OR -negation, and free text.
When a provider cannot
An operator a provider cannot apply is checked on the results where possible; otherwise the account's results come with an OPERATOR_UNSUPPORTED warning. in: takes the standard folders or one folder by name (in:Projects, any case); an account without that folder answers NOT_FOUND in warnings, and the others are still searched. One in: per search, and not inside OR or after -.