Please remember to include contact details in your message so we can get back to you. For example you might want to leave a phone number, if email is not accessible for you.

You can also try using Beep - https://www.beepaudio.com/ is a lightweight Chrome extension that allows you to record and send audio messages in Gmail for free. After installing Beep’s extension, you’ll see a red microphone button next to the Send button in Gmail’s compose window.

Clicking it lets you record your message. Once done, Beep inserts an audio player image and a link into the email body.