Click on no links in that email, and contact eBay Customer Services they can confirm whether they sent it.
eBay will always send their messages to you through their messaging system and address you by your real name, and not your username ID. Did this happen?
To Contact Customer Services I recommend using the link below for a Call Back option, and call as close to 8 a.m. on weekdays as possible, as there's more chance then, of Dublin answering.
https://www.ebay.co.uk/help/eua?id=5190
Lines open between 8 a.m. to10 p.m. on weekdays.
9 a.m. to 6 p.m. on weekends
Automated assistants are available outside these hours.
@melwales
