article the

Communication by e-mail is preferred to phoning (just an option).

Thank you for your reply.
So is it okay to use article 'the' with 'e-mail' and 'phone'?
How about the following sentence?

A popular means of transportation is the train not the bus.

It is really difficult for me to use articles correctly, so I appreciate a reply from a native speaker of English like you.
Chelendo

chelendoA popular means of transportation is the train not the bus.

This sentence is fine. But: I like to travel by bus rather than by train.

Thank you.

Let me go back to the first sentence ("A preferred means of communication is the e-mail").

So once again, there is no grammatical mistake in this sentence, correct?

Is it OK to say "The e-mail is popular"? Like we say, "The Internet is popular"?

I really would like to know if it sounds okay to a native speaker to use "the" with "e-mail" when you are

chelendonative speaker to use "the" with "e-mail"

It sounds strange to me. [ That doesn't necessarily make it 'wrong'. ]

Thanks for answering all these persistent questions of mine!
Chelendo