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Sendmux API
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Schema
Filter operations
Billing
3
Connection
1
Domain Filters
2
Domains
7
Emails
3
Inboxes
2
Mailbox API
52
Mailbox Filters
2
Mailboxes
13
get
/mailbox-send-policies/{scope}/{public_id}
Get a sending policy
put
/mailbox-send-policies/{scope}/{public_id}
Replace a sending policy
get
/mailboxes
List mailboxes
post
/mailboxes
Create a mailbox
get
/mailboxes/{public_id}
Get a mailbox
delete
/mailboxes/{public_id}
Delete a mailbox
patch
/mailboxes/{public_id}
Update a mailbox
post
/mailboxes/{public_id}/keys
Create a mailbox API key
delete
/mailboxes/{public_id}/keys/{key_id}
Revoke a mailbox API key
post
/mailboxes/{public_id}/resume
Resume a mailbox
post
/mailboxes/{public_id}/suspend
Suspend a mailbox
get
/mailboxes/{public_id}/usage
Read mailbox costs
get
/mailboxes/availability
Check mailbox address availability
Sending accounts
15
Webhooks
9
Mailboxes
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Changes to Get a mailbox
get
/mailboxes/{public_id}
Sep 9, 2026
7807ce923952
Revision changes
info
the endpoint scheme security
oauth2
was added to the API