I've 535 Incorrect authentication Error while using Nuxt Mail Module, only when I try to send an email on the deployed site ( on the server) I get the error

When I try to send an email from localhost It works fine, but when I deploy it to the server I'll get that error

The only difference is deployed site is over HTTPS, I don't know exactly what happened that I get this error but I hadn't this problem a week ago even on the deployed version These are my nuxt-configs for email:

 modules: [
  ['nuxt-mail', {
      message: [
        {name:'ticket',to: 'webticket@site.com'},
        {name:'contact',to: 'contactus@site.com'}
      ],
      smtp: {
        host: "mail.site.com",
        port: 587,
        auth: {
          user: 'webticket@site.com',
          pass: 'Aa123456'
        },
        secure: false,
        tls: {rejectUnauthorized: false},
      },
    }],
  ],

This is the error :