Mail Tester causes service crash if failed

[jacksondaw]

If the server is misconfigured the mail tester causes a crash, because result is undefined.

Ad-Hoc-Email-Server/server/app/mailTester.js

Line 61 in 92a96e7

logger.info('Mail tester error!', result.result);

{"level":"info","message":"connecting to db"}
(node:1) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
(Use `node --trace-deprecation ...` to show where the warning was created)
{"message":"Connected successfully to mongodb server","level":"info"}
{"message":"starting smtp on 25","level":"info"}
{"message":"API server listening","level":"info"}
{"message":"::ffff:10.175.153.38 - GET /api/alive HTTP/1.1 200 49 - 9.768 ms -\n","level":"info"}
{"message":"SMTP Connect from 127.0.0.1","level":"info"}
(node:1) Warning: Setting the NODE_TLS_REJECT_UNAUTHORIZED environment variable to '0' makes TLS connections and HTTPS requests insecure by disabling certificate verification.
/app/server/app/mailTester.js:61
      logger.info('Mail tester error!', result.result);
                                        ^
ReferenceError: result is not defined
    at /app/server/app/mailTester.js:61:41
    at /app/node_modules/nodemailer/lib/mailer/index.js:226:21
    at /app/node_modules/nodemailer/lib/smtp-transport/index.js:239:32
    at callback (/app/node_modules/nodemailer/lib/smtp-connection/index.js:435:13)
    at /app/node_modules/nodemailer/lib/smtp-connection/index.js:445:24
    at SMTPConnection._actionMAIL (/app/node_modules/nodemailer/lib/smtp-connection/index.js:1370:20)
    at SMTPConnection.<anonymous> (/app/node_modules/nodemailer/lib/smtp-connection/index.js:857:18)
    at SMTPConnection._processResponse (/app/node_modules/nodemailer/lib/smtp-connection/index.js:764:20)
    at SMTPConnection._onData (/app/node_modules/nodemailer/lib/smtp-connection/index.js:570:14)
    at TLSSocket.<anonymous> (/app/node_modules/nodemailer/lib/smtp-connection/index.js:710:55)