Nodejs -- errore in stampa con nodemailer

Ho una web application che utilizzaa nodejs e mysql.

Devo inviare una email e mi viene visualizzato questo errore 

0|Sif  | Error: Greeting never received
0|Sif  |     at SMTPConnection._formatError (/var/www/backend/html/node_modules/nodemailer/lib/smtp-connection/index.js:784:19)
0|Sif  |     at SMTPConnection._onError (/var/www/backend/html/node_modules/nodemailer/lib/smtp-connection/index.js:770:20)
0|Sif  |     at Timeout.<anonymous> (/var/www/backend/html/node_modules/nodemailer/lib/smtp-connection/index.js:704:22)
0|Sif  |     at listOnTimeout (node:internal/timers:594:17)
0|Sif  |     at process.processTimers (node:internal/timers:529:7) {
0|Sif  |   code: 'ETIMEDOUT',
0|Sif  |   command: 'CONN'
0|Sif  | }

penso il problema sia in una errata configurazione del file config.json

{

   "host": "localhost",
   "user": "uteente",
   "password": "miaPassword",
   "database":"db",
   "port":3306,
   "dialect": "mysql",
   "underscored": 0,
   "pool": {
     "max": 5,
     "min": 0,
     "acquire": 30000,
     "idle": 5000
   },
   "secret": "mysecret is zoe",
   "expiresIn": 86400,
   "emailFrom": "",   
   "smtpOptions": {
       "host": "authsmtp.securemail.pro",
       "port": 465,
       "auth": {
           "user": "userxx",
           "pass": "passworddominioo@."
       },
       "tls": {
           "rejectUnauthorized": false
       },
       "secure": true
   }
}

Nessuno ha avuto problemi di questo tipo ?

Grazie

Moreno