Când am deschis emailul, văzusem deja că Ana trimisese raportul.

They are both in the pluperfect tense, called mai-mult-ca-perfectul in Romanian.

• văzusem = I had seen
• trimisese = she had sent

Romanian uses this tense to show that one past action happened before another past action.

Because the sentence describes three points in the past, and Romanian marks their order clearly.

Timeline:

1. Ana trimisese raportul = Ana had sent the report.
2. văzusem deja = I had already seen/noticed that.
3. am deschis emailul = then I opened the email.

So:

• am deschis is perfectul compus: the main past event used as the reference point.
• văzusem and trimisese are earlier than that, so they go into the pluperfect.

Romanian has a single-word pluperfect, unlike English had + past participle.

Examples from the sentence:

• a vedea → văzusem
• a trimite → trimisese

Typical endings are added to the verb stem:

• -sem
• -seși
• -se
• -serăm
• -serăți
• -seră

So:

• eu văzusem = I had seen
• ea trimisese = she had sent

This is a very important tense in written Romanian and in more careful speech.

Yes, in everyday speech Romanians often replace the pluperfect with perfectul compus, especially in conversation.

So you may hear something like:

Când am deschis emailul, am văzut deja că Ana a trimis raportul.

That is more conversational, but it changes the feel a little:

• văzusem / trimisese = more explicit about the earlier timeline
• am văzut / a trimis = more common in spoken Romanian, but less precise about sequence

In formal writing, storytelling, or careful narration, the original version is very natural.

Grammatically, yes. But the logic depends on context.

Când am deschis emailul, văzusem deja... suggests that by the time you opened the email, you had already realized or already seen elsewhere that Ana had sent the report—maybe from:

• a notification
• the subject line
• a preview pane
• another message

If you mean that you discovered it after opening the email, then a more natural Romanian sentence might be:

Când am deschis emailul, am văzut că Ana trimisese deja raportul.

That means: When I opened the email, I saw that Ana had already sent the report.

Because Romanian usually attaches the definite article to the end of the noun.

So:

• email = an email / email

• emailul = the email

• raport = a report / report
• raportul = the report

This is one of the big differences from English. Instead of a separate word like the, Romanian often adds the article directly to the noun.

Because Romanian often drops subject pronouns when the verb ending already shows the person.

• am deschis already means I opened
• văzusem already means I had seen

So eu is unnecessary unless you want emphasis or contrast.

For example:

• Eu văzusem deja, dar el nu. = I had already seen, but he hadn’t.

că means that and introduces a subordinate clause.

So:

• văzusem deja că Ana trimisese raportul = I had already seen/noticed that Ana had sent the report

In English, that is often optional. In Romanian, că is usually expressed in this kind of sentence.

deja means already.

Here it modifies văzusem:

• văzusem deja = I had already seen

Its position is fairly flexible, but not completely free. Common placements include:

• văzusem deja că...
• deja văzusem că...

The version in your sentence is very natural. It puts the focus smoothly on the fact that the realization had happened earlier.

Because Când am deschis emailul is a subordinate clause placed before the main clause.

Romanian normally separates that kind of introductory clause with a comma:

• Când am deschis emailul, văzusem deja...

This is similar to English punctuation in sentences like:

• When I opened the email, I had already seen...

Both spellings can be seen, but email / emailul is very common in modern Romanian.

Possible variants:

• email
• e-mail

In everyday current usage, emailul looks completely normal. A learner should recognize both, but emailul is widely used and natural.