Interseller runs a various set amount of checks to ensure that emailing a contact is within the user's safety parameters. A list of the following errors can occur.

ErrorDescription
CRM_VALIDATION
MISSING_VARIABLE
BLACKLISTED
TEAM_BLACKLISTED
INVALID
DUPLICATE_CRM
DUPLICATE_CAMPAIGN
DUPLICATE_TEAM
DUPLICATE_DOMAIN
REPLIED_INDIRECTLY
REPLIED_CAMPAIGN
REPLIED_DOMAIN
REPLIED_TEAM
UNSUBSCRIBED
BOUNCED
GDPR_SUBJECT