Conversations, not messages
Replies are grouped into a thread, and a thread is archived, labelled or snoozed as one thing.
e archives · z snoozes · r replies
Undo send and schedule send
Every send waits ten seconds before it leaves, or whatever you set from none to thirty. A scheduled message waits until the time you picked.
Settings › Your addresses
Labels and filters
Labels you name, and filters that apply them to new mail as it arrives.
Per mailbox
Signatures and out-of-office
A signature per address, and an automatic reply with an end date so it does not keep answering after you are back.
Per address
Search inside every message
Subject, sender, the body and the names of attachments are indexed, so the word you remember is enough.
Indexed on arrival
Bring your old mail as a file
Upload a .mbox or an .eml file into your own address or a shared one. Messages already in the mailbox are skipped. Outlook .pst files need exporting as .mbox or .eml first.
Settings › Import
Your mail, as files
Export every message in your addresses as .eml files in one .zip, downloadable for a day.
Settings › Export