UnhandledPromiseRejectionWarning: Error: Not Found While sending email from Nestjs - node.js

Question

I am trying to develop a mail sending module in my NestJs project. when I send the mail through my local machine it works fine. But when it goes to the server (digital-ocean droplet) it throws the following error and it does not send any email further. what is going on and fix this?
My code segment is below:
Auth controller
#Post('register')
async register(#Body() register: RegisterRequest) {
const res = await this.authService.register(register);
if (res instanceof Error) {
throw res;
}
return {
statusCode: 200,
message:
'Your account is registered successfully. Please check your email to verify your account',
};
}
Auth Service
async register(register: RegisterRequest): Promise<any> {
register.isRegister = true;
register.status = 0;
register.roleId = 5;
const user = await this.userService.save(register);
console.log('User Saved');
if (user instanceof User) {
if (register.isRegister) {
console.log('IS REGISTER');
// Generate Token
const resultsToken = await this.userTokenService.save(user.id, 1);
console.log('USER TOKEN SAVED');
if (resultsToken) {
this.mailService.sendUserConfirmation(user, resultsToken.token);
}
}
}
return user;
}
User Service
async save(register: RegisterRequest): Promise<User> {
try {
const token = generateToken(8);
const user = new User();
user.email = register.email;
user.firstName = register.firstName;
user.lastName = register.lastName;
user.password = hashPassword(register.password || token);
user.role = register.roleId;
user.phoneNumber = register.phoneNumber;
user.isActive = register.status;
const errors = await validate(user);
if (errors.length > 0) {
throw new ParameterMissingException(
errors[0].constraints[Object.keys(errors[0].constraints)[0]],
);
}
const existing = await this.findOneByEmail(register.email);
if (existing) {
throw new EntityFoundException('Email');
}
const registered = await this.userRepository.save(user);
return registered;
} catch (error) {
return error;
}
}
User Token service
async save(userId: number, type: number): Promise<UserToken> {
try {
const userToken = new UserToken();
userToken.user = userId;
userToken.type = type;
userToken.token = generateToken();
if (type === 2) {
userToken.expireIn = 15;
}
console.log('USER TOKEN SAVE');
return await this.userTokenRepository.save(userToken);
} catch (error) {
console.log('USER TOKEN ERROR');
return error;
}
}
Mail Service
sendUserConfirmation(user: any, token: string) {
const url = `${
this.configService.get<string>('REGISTER_CONFIRM_URL') + token
}`;
console.log('MAIL SERVICE ' + url);
this.mailerService
.sendMail({
to: user.email,
// from: '"Support Team" <support#example.com>', // override default from
subject: 'Greetings from CEWAS!',
template: join(__dirname, 'templates') + './register-confirmation',
context: {
url,
},
})
.then((r) => console.log(r))
.catch((err) => {
console.log('MAIL SERVICE ERROR');
console.log(err);
});
}
Mail Module and Config
import { MailerModule } from '#nestjs-modules/mailer';
import { HandlebarsAdapter } from '#nestjs-
modules/mailer/dist/adapters/handlebars.adapter';
import { Module } from '#nestjs/common';
import { MailService } from './mail.service';
import { join } from 'path';
#Module({
imports: [
MailerModule.forRoot({
transport: {
service: 'gmail',
secure: true,
auth: {
user: '********#gmail.com',
pass: '********',
},
},
defaults: {
from: '"<No Reply>" <*******#gmail.com>',
},
template: {
dir: join(__dirname, 'templates'),
adapter: new HandlebarsAdapter(),
options: {
strict: true,
},
},
}),
],
providers: [MailService],
exports: [MailService],
})
export class MailModule {}

Answer 1

Hi try whit this configuration in your transport:
transport: {
host: 'smtp.gmail.com',
port: 465,
ignoreTLS: true,
secure: true,
auth: {
user: '********#gmail.com', //use the .env variable here for security
pass: '********'
},
}
and make sure you turned on access for less secure app
here the link: less secure app