How to write 'I'm emailing you in regard of [topic]'


I'd like to ask whether my writing is correct or not; I'm trying to write a
formal email following up my previous email in regard of topic X. The way I
write it is like this :

Xデモ​依頼​について,メールをお送りします.

I was wondering if this is the correct way to say it - it make sense in
English but seems awkward in Japanese.

In general this is what I'm trying to write :

Xデモ​依頼​について,メールをお送りします. ​突然のメール失礼いたします。

​先日​​送らせていただいたメールですが,ご確認いただけましたでしょうか​​。​

Xに関連するご質問がございましたらお気軽に​​​​お問い合わせください​。

お返事をお待ちしております.

Any suggestions to improve my awkward email is very much appreciated,
thankyou!




You can omit "突然のメール失礼いたします。". This sentence is normally used when you have
never sent the email before.

With regard to the first sentence, Xデモ​依頼 **の件​に** ついてメールをお送り **しています** 。
would sound more natural.

All the other parts are perfect.

