I'd like to meet you.
How are you?
You are looking for samples of emails written in German at the A1 level, which is a beginner's level of language proficiency. Here are a few resources and tips to help you with writing emails in German at the A1 level: german a1 email writing samples pdf
Subject: Hallo!
[Dein Name]
Bis bald!
Subject: Hello!
Hello [Name],