Yes it is.
noreply@bitcointalk.org , is official bot email from Bitcointalk
You have been received this because your default notification setting was set to always. see pics links below
https://prnt.sc/kev8cuIf you don't want to longer received this set to "Never"
Regarding to your priv.message. Fourge send your message with quoting name of yahoo62278 which is one of trusted bounty manager here, so i think it is spam, just delete and ignored it. be careful with such a kind of message like this.
Thanks BamBog, I recieved the same email in my spam folder.
The option for Bitcointalk not to send notifications is exactly in "Profile" , at the left side "Modify profile" and "Personal Message Options"
at the bottom change the option "Notify by email every time you receive a personal message:" from "Always" to "Never" and click on the
"Change profile" button.