Accuracy
Target language
Organization
Style
100

We met the following issue.

We faced the following issue.

100

We are sorry for the inconvenience .........

We are sorry for the inconvenience caused.

100

When do we start a new paragraph? 

When we express a new idea or thought. 

100

If you start your email with "Dear Sir/Madam", how should you finish it?

Yours faithfully

200

I'll finish it on next Friday.

I'll finish it next Friday.

200

Do not .............. to contact me if you have any further questions.

Do not hesitate to contact me if you have any further questions.

200

Is it a complete sentence? (Regarding your issue.)

No, it doesn't have a subject and a verb. 

200

Will you use contracted (short) forms in your email if you want to set a friendlier tone?

Yes

300

The issue has been resolved on Friday.

The issue was resolved on Friday.

300

Can we bring the meeting ........ to Monday 11 a.m.?

Can we bring the meeting forward to Monday 11 a.m.?

300

Is it a good idea to write one email on 2 different topics?

No, it's better to send 2 separate emails.

300

What is the difference between tone and style?

Style can be formal, neutral (semiformal) and informal. 

Tone is the emotional  quality of your communication (e.g. sarcastic, patronizing etc.)

400

I’m glad we had the opportunity to discuss about future releases.

I’m glad we had the opportunity to talk about/ to discuss future releases.

400

Please keep me ............ on any developments and updates.

Please keep me posted on any developments and updates.

400

In what case it might be ok to skip the salutation in your email? 

If it's an exchange of emails on the same day. 

400

Can you mix formal and informal styles in the same email? 

No, that would be weird. 

500

I suggest to discuss it next time.

I suggest discussing/we (should) discuss it next time.

500

............... to our meeting yesterday, let me summarize the main points. 

Further to our meeting yesterday, let me summarize the main points.

500
What's wrong with having only one-sentence paragraphs in your emails? 

It looks like a poem :) +  the reader might find it difficult to follow the main ideas of your email. 

500

What effect it might have on the reader if you change the style from neutral/informal to formal in your next email? 

The reader might think that they've done something wrong and upset you.