When getting an email out the door to your contacts, those using Gmail may sometimes notice it has been sent "via 1-hostingservice.com".
1-hostingservice.com is an E-goi domain designed to boost your deliverability. If your own domain reputation in E-goi is not quite perfect yet (this is par for the course in your first sends and will improve as you keep sending out relevant, targeted emails to your audience), Gmail will deliver your email via our 1-hostingservice.com domain to ensure the best possible inbox placement.
Is this normal?
Yep! It's actually proof your email marketing is done right :-)