HTTP 422
Attachment Too Large
A single attachment exceeded the 10 MiB per-file limit, or the combined decoded size of all attachments exceeded the 25 MiB total limit.
Example response
{
"type": "https://email.squibble.ch/docs/errors/messages/send/attachment-too-large/",
"title": "Attachment Too Large",
"status": 422,
"detail": "...",
"instance": "/api/v1/..."
}