Do you have an email signature that has your phone number, email address, website, etc?
Is yours an image or text? If it’s not text you could be missing a connection.
I read an email from someone the other day and I needed to call them back – I was using my phone so if they’d typed their number into the email or had a text-based signature I could have tapped the number and made the connection. As it was, I couldn’t even load the image with their number and had to call back later than they’d have hoped.
The image signature looks nice, but if you want your email signature to reach more people. try making it text.