Hoy no tengo internet, así que no puedo enviar el correo.

Spanish often drops subject pronouns when they are clear from the verb ending.

• tengo already means I have
• puedo already means I can

So Hoy no tengo internet naturally means Today I don’t have internet without needing yo.

You could say Hoy yo no tengo internet, but that adds emphasis, as if you were contrasting yourself with someone else.

In Spanish, tener is commonly used to talk about having access to something or having something available.

So:

• Tengo internet = I have internet / I have internet access
• No tengo internet = I don’t have internet

This is more natural than trying to use estar here. Spanish treats internet access as something you have, not a state you are.

In Spain, the most natural form is usually simply internet, with no article:

• No tengo internet

Using el internet is much less common in Spain. In some other Spanish-speaking regions, you may hear the article more often, but for Spain, internet by itself is the standard everyday choice.

In modern Spanish, internet is usually written with a lowercase i.

That matches current standard usage in Spanish, and it is also increasingly common in English. So internet in this sentence is written the normal way for contemporary Spanish.

Así que means so, therefore, or so that means in this kind of sentence.

It connects a cause to a result:

• No tengo internet → cause
• no puedo enviar el correo → result

So:

• Hoy no tengo internet, así que no puedo enviar el correo.
• Today I don’t have internet, so I can’t send the email.

It is a very common and natural connector in spoken and written Spanish.

The accent mark in así shows the correct stress: the emphasis falls on the last syllable.

• a-SÍ

Without the accent, it would not follow normal Spanish spelling rules for pronunciation. So the accent is necessary.

Because there are two separate verbs in two separate clauses, and each clause is negative:

• no tengo = I do not have
• no puedo enviar = I cannot send

So Spanish needs no in both parts:

• Hoy no tengo internet, así que no puedo enviar el correo.

This is not considered wrong or repetitive. It is just how negation works in Spanish.

These mean different things.

• no puedo enviar = I can’t send
• no envío = I don’t send / I’m not sending

The sentence is talking about ability, not just the action itself. The problem is that the speaker is unable to send the email because there is no internet. That is why poder + infinitive is used:

• puedo enviar = can send

After poder, Spanish normally uses an infinitive:

• puedo enviar = I can send
• puedo llamar = I can call
• puedo ir = I can go

This is very similar to English can + base verb.

So:

• no puedo enviar = I can’t send

Correo can mean mail/post, but in modern everyday context it often also refers to email, especially when the meaning is obvious.

Here, because of the context of internet and sending something, el correo most naturally means the email.

More explicit options would be:

• el correo electrónico = the email
• el email = the email

But el correo is very common and natural.

Spanish often uses the definite article where English might or might not use one.

Here, el correo means something like:

• the email
• the message
• the mail item

It suggests a specific email/message that the speaker and listener understand from context.

If you wanted a more general idea, you could also say things differently, but enviar el correo is a very normal phrase.

Yes. Both are possible.

• enviar el correo
• mandar el correo

Both can mean to send the email. In many contexts, enviar sounds a bit more neutral or formal, while mandar can sound a bit more everyday and conversational. In Spain, both are common.

Putting Hoy first emphasizes today.

• Hoy no tengo internet = Today, I don’t have internet

This is very natural when the speaker wants to set the time right away. Spanish is flexible, so you could also say:

• No tengo internet hoy

That also works, but the emphasis is slightly different. Starting with Hoy makes today the first thing the listener notices.

Yes, several small variations would still sound natural. For example:

• Hoy no tengo internet, así que no puedo mandar el correo.
• Hoy no tengo conexión a internet, así que no puedo enviar el correo.
• Hoy estoy sin internet, así que no puedo enviar el correo.

These all keep the same basic idea, though the original sentence is already perfectly natural and clear.