I'm implementing a class for sending emails on Android.
And I'm implementing so that I can support most email services. Ex: Gmail, Live, Yahoo, and e-mail domain (eg [email protected]).
So I'm having problems with some providers using Secure Sockets Layer (SSL) and other Transport Layer Security (TLS) . I do not know clearly what it is, what it is for, and what the difference is between them. And I'd like to get a better understanding of each one of them. In order to find a better solution to my problem.
Example of what I'm talking about
Live (smtp.live.com:587), does not accept SSL only accepts TLS.
The others I tested (Gmail (smtp.gmail.com:465) and Yahoo (smtp.mail.yahoo.com:465)), accept SSL, (Note: if I configure SSL and TLS, it also works in this case).
I would like to understand these differences, to make the configuration of an email as simple as possible for the user. And at the same time I want to support the largest number of email providers.
Today I'm asking in user configuration only:
- SMTP host;
- SMTP Port;
- Username (e-mail);
- What if the provider requires SSL or not;
I know that this protocol subject is broad and is used not only in email providers, but also in other types of network communication (such as TCP, HTTP, HTTPS (with SSL)), so I would like to keep the focus only on email submissions.
Note: I would like to clarify only the protocols, not the implementation, I just mentioned what I'm using in order to be clearer.