المعلومات في الرسالة.

A natural Egyptian-style pronunciation is:

el-maʕluumaat fir-risaala

A more detailed breakdown:

• المعلومات → el-maʕluumaat
• في → fi
• الرسالة → ir-risaala / er-risaala

A few notes:

• The ع in معلومات is a deep throat sound that English does not have.
• In الرسالة, the ل of ال is not pronounced clearly, because ر is a sun letter. So الرسالة sounds like er-risaala, not el-risaala.
• In fast speech, fi er-risaala often blends into fir-risaala.

Because Arabic usually leaves out is / am / are in the present tense.

So:

• المعلومات في الرسالة literally looks like:
• the information in the message

But it means:

• The information is in the message.

This is completely normal in both Standard Arabic and Egyptian Arabic. If you want to say this in the present, you normally do not add a verb for is.

Because both nouns are definite here.

• المعلومات = the information
• الرسالة = the message / the letter

In Arabic, ال is the definite article, like the in English.

So the sentence is specifically talking about:

• the information
• the message

not just

• information
• a message

Yes. في is the normal word for in.

Examples:

• في البيت = in the house
• في المدرسة = in the school
• في الرسالة = in the message / in the letter

It is one of the most common prepositions in Arabic.

Because ر is a sun letter.

In Arabic, when ال comes before certain letters, the ل sound assimilates to the next consonant. ر is one of those letters.

So:

• written: الرسالة
• pronounced: ar-risaala / er-risaala

In Egyptian Arabic, learners often hear er-risaala.

This happens in many words:

• الشمس → esh-shams
• الراجل → er-raagil
• الرسالة → er-risaala

Grammatically, معلومات is a plural form.

It comes from:

• معلومة = a piece of information / a fact
• معلومات = information / pieces of information

But in English, information is usually treated as an uncountable noun. So even though Arabic uses a plural form, the natural English translation is often just information.

That is why:

• المعلومات can translate as the information not necessarily
• the informations (which is not natural English)

It works in Egyptian Arabic, but it is also very close to Standard Arabic.

The words themselves are not unusual in Egyptian:

• معلومات
• في
• رسالة

So an Egyptian speaker can definitely say this. The main Egyptian feature you would notice is the pronunciation, especially:

• ال → often el-
• الرسالة → er-risaala

So the sentence is fine for Egyptian learners, even though it also looks very standard.

It can mean either, depending on context.

رسالة may refer to:

• a letter
• a message
• sometimes even a written communication more generally

So في الرسالة could mean:

• in the letter
• in the message

The correct choice depends on the situation you are talking about.

It is a very simple nominal sentence:

• المعلومات = the topic
• في الرسالة = a prepositional phrase giving the location

So the structure is basically:

[noun] + [prepositional phrase]

which gives the meaning:

The information is in the message.

This kind of sentence is very common in Arabic.

Yes, you could. A speaker would mainly change the pronunciation, not the wording.

So in writing:

• المعلومات في الرسالة

In spoken Egyptian, it might sound like:

• el-maʕluumaat fir-risaala

So the sentence is already usable; just be aware that spoken Egyptian pronunciation will sound different from how a beginner might read it letter by letter.