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/Sendmux API

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Schema

Filter operations

Billing3

Connection1

Domain Filters2

Domains7

Emails3

Inboxes2

Mailbox API52

post/mailbox/attachment-uploadsCreate a presigned mailbox attachment upload
post/mailbox/attachments:uploadUpload a mailbox attachment
get/mailbox/changesGet mailbox changes
get/mailbox/connectionGet Mailbox connection
get/mailbox/draftsList saved drafts
post/mailbox/draftsCreate a saved draft
get/mailbox/drafts/{draftId}Read a saved draft
delete/mailbox/drafts/{draftId}Delete a saved draft
patch/mailbox/drafts/{draftId}Edit a saved draft
patch/mailbox/drafts/{draftId}/scheduleReschedule or cancel a saved draft send
post/mailbox/drafts/{draftId}/sendSend a saved draft revision
get/mailbox/eventsStream mailbox events
get/mailbox/foldersList mailbox folders
post/mailbox/foldersCreate a mailbox folder
get/mailbox/folders/{folder_id}Get a mailbox folder
delete/mailbox/folders/{folder_id}Delete a mailbox folder
patch/mailbox/folders/{folder_id}Update a mailbox folder
get/mailbox/folders/changesGet folder changes
get/mailbox/folders/query-changesGet folder query changes
get/mailbox/identitiesList mailbox sender identities
get/mailbox/identityGet mailbox sender identity
patch/mailbox/identityUpdate mailbox sender identity
get/mailbox/mailboxesList granted mailboxes
get/mailbox/meSelf-introspect the calling mailbox
get/mailbox/messagesList mailbox messages
post/mailbox/messages:batch-deleteBatch delete mailbox messages
post/mailbox/messages:batch-getBatch get mailbox messages
post/mailbox/messages:batch-updateBatch update mailbox messages
get/mailbox/messages/{message_id}Get a mailbox message
delete/mailbox/messages/{message_id}Delete a mailbox message
patch/mailbox/messages/{message_id}Update mailbox message flags
get/mailbox/messages/{message_id}/attachments/{attachment_id}Download a message attachment
get/mailbox/messages/{message_id}/attachments/{attachment_id}/textRead attachment text
post/mailbox/messages/{message_id}/attachments/{attachment_id}/textRequest attachment text
get/mailbox/messages/{message_id}/bodyGet raw message body
get/mailbox/messages/{message_id}/contentGet clean message content
get/mailbox/messages/{message_id}/rawDownload the original message
get/mailbox/messages/countCount mailbox messages
get/mailbox/messages/query-changesGet message query changes
get/mailbox/messages/search-snippetsGet message search snippets
post/mailbox/messages/sendSend a mailbox message
get/mailbox/quotasList mailbox quotas
get/mailbox/quotas/changesGet quota changes
get/mailbox/sessionGet mailbox API session
get/mailbox/submissionsList mailbox submissions
get/mailbox/submissions/{submission_id}Get a mailbox submission
get/mailbox/submissions/changesGet submission changes
get/mailbox/threadsList mailbox threads
get/mailbox/threads/{thread_id}Get a mailbox thread
get/mailbox/threads/{thread_id}/contentGet clean thread content
get/mailbox/threads/{thread_id}/messagesList thread messages
get/mailbox/usageGet mailbox usage

Mailbox Filters2

Mailboxes13

Sending accounts15

Webhooks9

Mailbox API

Changes to Delete a saved draft

delete/mailbox/drafts/{draftId}

Oct 3, 2026901435205640 Revision changes
- info
  endpoint added