Hi, @ls1promos. There are no MX records for the domain name in the email address:
$ dig deancocleaning.co.uk MX
; <<>> DiG 9.10.6 <<>> deancocleaning.co.uk MX
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52402
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;deancocleaning.co.uk. IN MX
;; AUTHORITY SECTION:
deancocleaning.co.uk. 1800 IN SOA dns1.p01.nsone.net. domains+netlify.netlify.com. 1678224374 43200 7200 1209600 3600
;; Query time: 61 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Wed Mar 15 17:43:28 PDT 2023
;; MSG SIZE rcvd: 130
The SOA record is being returned above. DNS servers return SOA records when the requested record does not exist.
To summarize, there is no email service configured for this domain. Please see the following section of this support guide about the various ways to resolve this: