(Just in case you are dying to send fan mail/love letters/hate mail etc.)
This is correct as of October 2021
My Warwick email will be in use until summer 2022:
It is my first initial dot my surname at the domain warwick.ac.uk.
(It doesn't matter if the b or the s are capitalised; but all other letters should be lower case.)
I.e., if you read it out loud, you might say something like:
"Bee Dot Sewell At Warwick Dot Ay Cee Dot You Kay."
(You can hear Google translate saying this expression here.)
Old-fashioned correspondence can be sent to me at Rényi:
POB 127, H-1364, Budapest, Hungary