Compose & send

Click Compose in the Mail sidebar to write a message. The composer gives you To, Cc, and Bcc, a rich-text body, attachments up to 25 MB, and a From selector when you have more than one mailbox. Reply, Reply all, and Forward work from any open message. Drafts save themselves as you type, so a closed tab keeps everything except the last couple of seconds. When you send, Mail confirms Queued for delivery. only once the platform accepts the message, and shows the exact reason when it does not.

Write and send a message

1. Click Compose.
2. If you have more than one mailbox, pick the sending address in the From selector. A Gmail or Outlook address you have connected is listed there too; see Send from your Gmail or Outlook address.
3. Type a name or address in To. Suggestions appear after two characters, drawn from your contacts and people you have mailed before.
4. To copy more people, click Cc/Bcc and fill either field.
5. Write your subject and message. The toolbar gives you Bold, Italic, underline, bulleted lists, links, and Clear formatting.
6. Click the paperclip to attach files (25 MB total per message).
7. Click Send. A success reads Queued for delivery.

Recipients appear as chips

When you leave the To, Cc or Bcc field, each recipient turns into a chip that shows the name, or the address when there is no name. Click the field to edit the text again, or click the x on a chip to remove that recipient. An address you type twice counts once.

A chip turns red when the address looks wrong, and pointing at it shows why. The only address check Mail makes before it sends is for an entry with no @, with a message such as Check the address "pat". It needs an @. Every other check happens on the server when you send, and a message that fails there tells you the reason.

Undo a send

By default, hitting Send holds the message for ten seconds before it actually goes. During the hold the composer shows Sending… with an Undo button; click Undo and the message drops back into the composer with everything intact, so you can fix a typo or add a forgotten attachment and send again. Leave it alone and the message sends when the window elapses. If you start a new message or move away during the hold, the held message is sent, not dropped. Change the window under Settings → Compose → Undo send: Off, 5, 10, 20, or 30 seconds. Set it to Off to send the instant you click.

Reply, reply all, and forward

Open a message, then use the buttons above it.

• Reply goes to the address the message asked for answers to be sent to (its Reply-To, which website forms and ticket systems set) and otherwise to the sender, and quotes the original below your cursor. A Reply-To that points back at your own mailbox is ignored.
• Reply all goes to that same address and puts everyone else from the original To and Cc in Cc. Your own address and any of your aliases are left out, so you never copy yourself.
• On a message you sent, such as one in the Sent folder, Reply goes to the people you sent it to, not to yourself, and Reply all keeps them in To and Cc as you wrote them.
• Forward starts a fresh message with a "Forwarded message" header and the original quoted. Add your own recipients. A forward carries the quoted text, not the original message's file attachments.

Cc, Bcc, and recipient privacy

Cc is visible to every recipient. Bcc is private: each Bcc recipient gets their own copy and cannot see the other Bcc addresses, or even the To and Cc lists. One message can carry up to 100 recipients across To, Cc, and Bcc combined. For a larger audience, use Email Marketing.

Attach files

Click the paperclip and pick one or more files. Each shows as a chip you can remove before sending. The limit is 25 MB total per message; a file that pushes you over is skipped with a warning. Attachments are not stored with a saved draft, so add them when you are ready to send.

Drafts save themselves

Start typing and Mail saves a draft every couple of seconds. You never click Save. A small chip in the composer header shows where the draft stands: Saving…, Draft saved with the time, or Not saved if something went wrong.

1. Open the Drafts folder to see your unsent messages.
2. Click a draft. The composer reopens with your text, recipients, reply threading, and chosen From address restored.
3. Send a draft and it is deleted; a send that fails keeps the draft so you can retry.

Closing a message with real content in it asks "Discard draft?" so you can keep it as a draft or discard it. Two limits are worth knowing: a draft stores plain text, so rich formatting is not kept across a save and reopen, and attachments are not saved with a draft. Your drafts stay private even inside a shared team inbox.

Choose which address you send from

When you belong to more than one mailbox, a From selector appears at the top of the composer. Pick your personal address or a shared one such as support@. The choice is saved with the draft and checked again when you send. See Shared team inboxes.

Your signature

Click Settings in the Mail sidebar, then Signature, and write your signature in the editor: bold, italic, underline, bulleted lists and links. Click Save signature. Each mailbox keeps its own, so a shared support@ address can sign differently from your personal one. A saved signature applies to messages you send afterward. It does not rewrite mail already sent.

Mail adds the signature on the server when the message goes out, so it is not typed into the body you edit. The composer shows a line that previews the start of the signature for the mailbox you are sending from. Two choices under the editor decide what happens next:

These two choices belong to you and apply to everything you send, from any mailbox. The signature text belongs to the mailbox.

If your workspace has Appointments and your personal booking page is on, a third option appears under them: Add my booking link to my signature. It adds one line with your link, such as "Book a time with me: example.com/book/weldon", under the signature, and the composer previews it the same way. It follows the two choices above, and it is added from your own mailbox only, never from a shared one. Mail apps such as Apple Mail and Outlook, and messages sent through a connected Gmail or Outlook address, are not touched. See Your personal booking link.

Your name on a mailbox, the name people see in the From line, is under Settings → Profile, next to your photo. Only the owner of a personal mailbox can change it. See Mail settings.

What the delivery status means

Every sent message carries a status chip in the Sent folder and in the reader. It starts at Queued and becomes Sent once the platform accepts the message for delivery. When the platform confirms more about a message, such as a bounce or a spam complaint, the chip reflects that. Mail does not track whether a recipient opened or read your message.

Why didn't my email send?

A message that cannot be sent files no Sent copy and keeps your draft for retry. The composer shows the specific reason.

A recipient already on the suppression list is dropped from the send quietly. Suppression is explained in Mail administration & deliverability.

Sending limits at a glance

• 300 messages per hour per mailbox.
• 100 recipients per message across To, Cc, and Bcc.
• 25 MB of attachments per message.
• Subject up to 998 characters.

To reach a large list, use Email Marketing, which is built for volume and reports opens and clicks.

Related

• Mail overview
• Read, search & organize
• Mail settings
• Shared team inboxes
• Mail administration & deliverability
• Email Marketing for campaigns to a list.