Sending emails with Angular 7 + SpringBoot

I am able to send emails with SpringBoot and hardcoded data.

Now the problem is to get the data from my Angular form, and call the API with the data from there, but I'm getting error 500.

Can someone know where is the problem?

EmailService.java

@Servicepublic class EmailService {    private JavaMailSender javaMailSender;    @Autowired    public EmailService(JavaMailSender javaMailSender){        this.javaMailSender = javaMailSender;    }    public void sendEmail(Email email) throws MailException {        SimpleMailMessage mail = new SimpleMailMessage();        mail.setTo("marioluarca7@gmail.com");        mail.setFrom(email.getEmail());        mail.setSubject("Contacto: "+email.getNombre());        mail.setText(email.getMensaje());        javaMailSender.send(mail);    }}

CustomerController.java

@CrossOrigin(origins = "http://localhost:4200")@RestController@RequestMapping("/api")public class CustomerController {  @Autowired  private EmailService emailService; //some other code  @PostMapping(value = "/email")  public ResponseEntity<Email> enviarEmail( Email email){    try {      emailService.sendEmail(email);      return new ResponseEntity<>(email,  HttpStatus.OK);    } catch( MailException e){      return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);    }  }}

contacto.component.ts

import { Component, OnInit } from '@angular/core';import { Observable } from 'rxjs';import { HttpClient } from '@angular/common/http';import { Email } from 'src/app/models/email';import { EmailService } from 'src/app/services/email.service';import { NgForm } from '@angular/forms';@Component({  selector: 'app-contacto',  templateUrl: './contacto.component.html',  styleUrls: ['./contacto.component.css']})export class ContactoComponent implements OnInit {  ngOnInit() {  }  mail :Email = new Email();  constructor(private http: HttpClient, private emailService :EmailService) { }  private enviarEmail() {    this.emailService.enviarEmail(this.mail)      .subscribe(data => console.log(data));  }  private onSubmit() {    this.enviarEmail();  }}

contacto.component.html

<form (ngSubmit)="onSubmit()" #contacto><div class="form-group"><label for="nombre">Nombre</label><input type="text" class="form-control" id="name" required [(ngModel)]="mail.nombre" name="nombre"></div><div class="form-group"><label for="email">Email</label><input type="text" class="form-control" id="email" required [(ngModel)]="mail.email" name="email"></div><div class="form-group"><label for="mensaje">Mensaje</label><input type="text" class="form-control" id="mensaje" required [(ngModel)]="mail.mensaje" name="mensaje"></div><button type="submit" class="btn btn-success">Contactar</button></form>

email.service.ts

import { Injectable } from '@angular/core';import { HttpClient } from '@angular/common/http';import { Observable } from 'rxjs';import { Email } from '../models/email';@Injectable({  providedIn: 'root'})export class EmailService {  constructor(private http :HttpClient) { }  private baseUrl = 'http://localhost:8080/api/email';  enviarEmail(email :Email): Observable<any> {    return this.http.post(`${this.baseUrl}`, email);  }}