Email Error Codes

API error codes returned by the transactional email service. Codes are numeric values in the response body when a request fails validation or business rules.

Code	Description
Validation — missing or invalid fields
8	Empty data
10	Empty sender email address
11	Can't find recipients addresses
13	Empty email message content field
701	Empty sender name or email address
720	Empty subject field
721	Empty email message content field
901	Empty sender name field
903	Empty sender email address field
906	Email address syntax error
1101	Empty email address field
201	Empty mailing list name
Not found
14	Can't find email address with a specified ID
17	Can't find email address
21	Can't find email on activation
213	Mailing list not found
303	Can't find email addresses in the mailing list
502	Can't find email address
602	Can't find campaign — probably already sent
703	Can't find mailing list
704	Can't find sender
722	Can't find mailing list ID
802	Can't find campaign
1003	The specified sender doesn't exist
1104	Can't find activation code
Conflict — already exists
19	Email address already exists
203	Mailing list name already exists
902	Chosen email address is already used
Policy & restrictions
20	Not allowed to use free mail services
97	Invalid email address type — free mail not allowed
904	Email address is blacklisted
905	Limit of available sender addresses reached
711	Wait 15 minutes before creating new campaign on same list
1004	Activation code sent — wait 15 minutes before next try
Account & billing
707	Not enough funds on account balance
400	Can't find SMTP user — create SMTP service account
Other
799	Wrong send date format or date in the past
800	Invalid operation
1005	Confirmation sending error