Too many recipients on the sent message. Troubleshooting: The recipient limit is a configurable limit on the receiving server. ...

{4}: Too many recipients on the sent message. Troubleshooting: The recipient limit is a configurable limit on the receiving server. To resolve this issue, either increase the recipient limit, or break up the message into multiple messages to fit the server limit. Note The default recipient limit on a Simple Mail Transfer Protocol (SMTP) message is 5000.