Campaign precondition codes

When setting a campaign to ready=true, the API can return an HTTP status code of 422 unprocessable entity with code failed_precondition.

{
  "type": "failed_precondition",
  "message": "The campaign cannot be sent in it's current state. See <https://docs.bigmailer.io/docs/campaign-api-precondition-codes>",
  "preconditions": [
    "scheduled_for.date"
  ]
}

If this is returned by the API, there are one or more changes that need to be made to the campaign in order for it to be sendable. The codes in the preconditions array tells you what needs to be changed.

Here are the codes and their meanings:

Code	Description
account.contacts	The account has exceeded the maximum number of contacts on the current subscription plan. The subscription needs to be updated before campaigns can be sent.
account.status	The account has been suspended, payment is past due, or was not activated.
brand.contacts	The maximum number of contacts allowed on this brand has been exceeded. Contact your account administrator for help.
campaign.status	The campaign cannot be updated given it's current status.
connection.status	The connection used to send email (AWS, SparkPost, etc) is not properly configured.
feed_url.format	The RSS feed url is not valid.
from_email.format	The from email address is not valid.
from_email.verify	The from email address has not been verified.
html.unsub	The html template does not contains an unsubscribe link.
link_params.format	The link parameters is not a valid query string.
lists.length	At least one list must be specified to send contacts to.
recipients.format	The test recipients list is not a valid list of email addresses.
recipients.length	The test recipients list cannot exceed 10,000 characters.
reply_to_email.format	The reply to email is not valid.
scheduled_for.date	The date the campaign is scheduled for is in the past.
subject.format	The subject must not be empty.
text.unsub	The text template does not contain an unsubscribe link.
update_days.length	The RSS campaign must specify at least one day to be sent on.