Exception Handling: MailSenderException

[Flashky]

Bad credentials

When using an incorrect password for ```MAIL_PASSWORD``:

org.simplejavamail.mailer.internal.mailsender.MailSenderException: Third party error
[...]
Caused by: javax.mail.AuthenticationFailedException: 535-5.7.8 Username and Password not accepted. Learn more at

When using bad credentials:

1. Log as error.
2. Log cause as error.
3. Terminate program.

Unknown SMTP host

When using an invalid SMTP hostname:

simplejavamail:
  smtp:
    host: smtp.gmail.commmmmm

`
The following exception will ocurr:

org.simplejavamail.mailer.internal.mailsender.MailSenderException: Third party error
[...]
Caused by: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.gmaill.com, 587; timeout -1;
[...]
Caused by: java.net.UnknownHostException: smtp.gmaill.com
[...]

Either the host server is down at that moment, or the hostname is incorrect.

First, we should do a test connection when the Mailer object is created. If that test worked and we get this exception later, we can confirm at 99,9% that the server is just down.

Therefore, we should handle as it follows:
When test connecting

[Flashky]

Won't be done for now.