# Create Mailgun SMTP credentials for a given domain Create Mailgun SMTP credentials for a given domain Endpoint: POST /v3/domains/{domain_name}/credentials Version: 3.0.0 Security: basicAuth ## Path parameters: - `domain_name` (string, required) Hostname for new credentials ## Request fields (multipart/form-data): - `login` (string, required) Email address of SMTP credential user; accepts multiple values - `mailbox` (string) Email address of SMTP credential user, may be used in place of 'login'; accepts multiple values - `system` (boolean) Identify if these are system account credentials, defaults to false - `password` (string) Supply desired password(s) for the new credentials if preferred over generated ones; accepts multiple values ## Response 200 fields (application/json): - `message` (string, required) Response message - `note` (string) Note to store password (when generated by Mailgun) - `credentials` (object) Credential username/password values (when generated by Mailgun) ## Response 400 fields (application/json): - `message` (string, required) Response message