You need to be an owner or an admin.
Email addresses are included on Orbit (1) and Landing (3). On Landing you can add more for a monthly price each. Launch doesn't include them. See Plans and billing.
You need to be able to change the DNS settings of a domain your organisation owns, such as example.com. You can't use a public email service, such as gmail.com.
Open Organisation settings, then Integrations.
Under Email, enter your domain and choose Add domain.
Copy each DNS record shown into your domain's DNS settings, wherever your domain is managed. Each record has a type, a host and a value.
Choose Check again. Each record shows Not found yet, Checking or Found. Once they're all found you can add addresses.
Choose Add address.
Enter the part before the @, such as "support".
Give it a name, such as "Acme Support".
Choose who can send from it, or leave it open to everyone who can send email.
Choose Add address.
Replies come straight back to 53°. This is the default and needs no set-up. When a customer replies, their email goes to the forwarding address.
Replies go to this address, and I forward it to 53°. Customers reply to your own address, such as support@example.com. Choose this if you also want replies in your existing mailbox, then set up forwarding from that mailbox to the forwarding address.
In the Google Admin console, open Directory, then Groups, and choose the group.
In the group's settings, allow people outside your organisation to be members.
Open Members and add the forwarding address as a member.
Open Settings, then See all settings, then Forwarding and POP/IMAP.
Choose Add a forwarding address and enter the forwarding address.
Gmail sends a confirmation email to it. In 53°, open the address in your Email settings. The confirmation appears there. Follow the link in it, then choose Done.
In the Exchange admin centre, open the mailbox or the shared mailbox.
Under Mail flow settings, turn on forwarding and enter the forwarding address.
Keep a copy in the mailbox if you want replies in both places.
Replies and proposals sent from your addresses count, and so do form responses an automation forwards from one.
Emails you send from your own email app don't count.
Your organisation's owners are notified when you're close to the limit, and again when you reach it.
At the limit, choose My email app to keep sending. Your addresses can send again as the day's earlier emails pass 24 hours.
If too many of your emails bounce or are marked as spam, sending from your addresses is paused to protect your domain's reputation. Your addresses still receive email, and your team can still reply from their own email apps. Contact support to resume sending.
There's a limit on how many emails your organisation can send from its addresses each day.
Emails sent to and from your addresses are kept in 53° for your team until you delete them.
Removing an address keeps its conversations. They can't be replied to from that address afterwards.
If you move to Launch, which doesn't include email addresses, nothing is sent from your addresses and emails sent to them aren't kept. Your domain and addresses stay set up for when you upgrade. Your team can still reply from their own email apps.
If you move to a plan with fewer addresses, the extra addresses are kept and still receive email. Sending from the newest ones stops until you remove some or upgrade.
Files attached to an email that arrives are kept with it. They open from the message in the inbox, and anyone who can read the conversation can open them. They count towards your organisation's file storage. An email's attachments are kept up to 25 MB together, of the kinds you can upload to Files.
When an attachment can't be kept, the email still arrives and a note under it names the file and says why: your file storage is full, the email's attachments came to more than 25 MB, it's a type that isn't accepted, or it couldn't be downloaded. Programs and scripts are never kept.
Pictures shown inside an email, such as a logo in a signature, aren't kept.
Your team can attach files to an email sent from one of your addresses, up to 25 MB an email. Those files count towards your file storage too. See Manage responses in the inbox.
Deleting a conversation deletes the files that arrived in it, and the files your team attached in it, and frees their storage.
Emails that arrive are stored as text.