ReaperCloud

DKIM Lookup

DKIM keys have no directory. If you don’t know the selector, we’ll try 100 common ones at once and tell you what we find.

Keys found 100
Selectors tried 100
Strongest key 512-bit
Weakest key 512-bit

Errors

Keys

SelectorTypeSizeFlagsLikely provider
selector1 selector1._domainkey.gov.uk RSA 512-bit too small none Microsoft 365
selector2 selector2._domainkey.gov.uk RSA 512-bit too small none Microsoft 365
google google._domainkey.gov.uk RSA 512-bit too small none Google Workspace
1984 1984._domainkey.gov.uk RSA 512-bit too small none 1984 Hosting
default default._domainkey.gov.uk RSA 512-bit too small none generic default
dkim dkim._domainkey.gov.uk RSA 512-bit too small none generic
mail mail._domainkey.gov.uk RSA 512-bit too small none generic
email email._domainkey.gov.uk RSA 512-bit too small none generic
key1 key1._domainkey.gov.uk RSA 512-bit too small none generic
key2 key2._domainkey.gov.uk RSA 512-bit too small none generic
s1 s1._domainkey.gov.uk RSA 512-bit too small none generic
s2 s2._domainkey.gov.uk RSA 512-bit too small none s2 / various
k1 k1._domainkey.gov.uk RSA 512-bit too small none Mailchimp / generic
k2 k2._domainkey.gov.uk RSA 512-bit too small none generic
k3 k3._domainkey.gov.uk RSA 512-bit too small none generic
smtp smtp._domainkey.gov.uk RSA 512-bit too small none generic
mx mx._domainkey.gov.uk RSA 512-bit too small none generic
x x._domainkey.gov.uk RSA 512-bit too small none generic
mandrill mandrill._domainkey.gov.uk RSA 512-bit too small none Mailchimp Transactional
mailchimp mailchimp._domainkey.gov.uk RSA 512-bit too small none Mailchimp
sendgrid sendgrid._domainkey.gov.uk RSA 512-bit too small none SendGrid
s1024 s1024._domainkey.gov.uk RSA 512-bit too small none SendGrid
smtpapi smtpapi._domainkey.gov.uk RSA 512-bit too small none SendGrid
mailjet mailjet._domainkey.gov.uk RSA 512-bit too small none Mailjet
mailgun mailgun._domainkey.gov.uk RSA 512-bit too small none Mailgun
mg mg._domainkey.gov.uk RSA 512-bit too small none Mailgun
krs krs._domainkey.gov.uk RSA 512-bit too small none Klaviyo
klaviyo klaviyo._domainkey.gov.uk RSA 512-bit too small none Klaviyo
sparkpost sparkpost._domainkey.gov.uk RSA 512-bit too small none SparkPost
scph0819 scph0819._domainkey.gov.uk RSA 512-bit too small none SparkPost
pm pm._domainkey.gov.uk RSA 512-bit too small none Postmark
pmta pmta._domainkey.gov.uk RSA 512-bit too small none PowerMTA
hs1 hs1._domainkey.gov.uk RSA 512-bit too small none HubSpot
hs2 hs2._domainkey.gov.uk RSA 512-bit too small none HubSpot
hubspot hubspot._domainkey.gov.uk RSA 512-bit too small none HubSpot
sm sm._domainkey.gov.uk RSA 512-bit too small none SalesManago / various
sfmc sfmc._domainkey.gov.uk RSA 512-bit too small none Salesforce Marketing Cloud
sfdc sfdc._domainkey.gov.uk RSA 512-bit too small none Salesforce
et et._domainkey.gov.uk RSA 512-bit too small none Salesforce ExactTarget
zendesk1 zendesk1._domainkey.gov.uk RSA 512-bit too small none Zendesk
zendesk2 zendesk2._domainkey.gov.uk RSA 512-bit too small none Zendesk
intercom intercom._domainkey.gov.uk RSA 512-bit too small none Intercom
freshdesk freshdesk._domainkey.gov.uk RSA 512-bit too small none Freshdesk
zoho zoho._domainkey.gov.uk RSA 512-bit too small none Zoho
zohomail zohomail._domainkey.gov.uk RSA 512-bit too small none Zoho
amazonses amazonses._domainkey.gov.uk RSA 512-bit too small none Amazon SES
ses ses._domainkey.gov.uk RSA 512-bit too small none Amazon SES
protonmail protonmail._domainkey.gov.uk RSA 512-bit too small none Proton Mail
protonmail2 protonmail2._domainkey.gov.uk RSA 512-bit too small none Proton Mail
protonmail3 protonmail3._domainkey.gov.uk RSA 512-bit too small none Proton Mail
fm1 fm1._domainkey.gov.uk RSA 512-bit too small none Fastmail
fm2 fm2._domainkey.gov.uk RSA 512-bit too small none Fastmail
fm3 fm3._domainkey.gov.uk RSA 512-bit too small none Fastmail
mesmtp mesmtp._domainkey.gov.uk RSA 512-bit too small none Fastmail
titan1 titan1._domainkey.gov.uk RSA 512-bit too small none Titan
titan2 titan2._domainkey.gov.uk RSA 512-bit too small none Titan
cm cm._domainkey.gov.uk RSA 512-bit too small none Campaign Monitor
dkimrnd dkimrnd._domainkey.gov.uk RSA 512-bit too small none various
mailer mailer._domainkey.gov.uk RSA 512-bit too small none generic
mailo mailo._domainkey.gov.uk RSA 512-bit too small none generic
bounce bounce._domainkey.gov.uk RSA 512-bit too small none generic
news news._domainkey.gov.uk RSA 512-bit too small none generic
notify notify._domainkey.gov.uk RSA 512-bit too small none generic
noreply noreply._domainkey.gov.uk RSA 512-bit too small none generic
support support._domainkey.gov.uk RSA 512-bit too small none generic
info info._domainkey.gov.uk RSA 512-bit too small none generic
ml ml._domainkey.gov.uk RSA 512-bit too small none generic
m1 m1._domainkey.gov.uk RSA 512-bit too small none generic
sig1 sig1._domainkey.gov.uk RSA 512-bit too small none generic
sel1 sel1._domainkey.gov.uk RSA 512-bit too small none generic
sel2 sel2._domainkey.gov.uk RSA 512-bit too small none generic
dk dk._domainkey.gov.uk RSA 512-bit too small none legacy DomainKeys
dkim1 dkim1._domainkey.gov.uk RSA 512-bit too small none generic
ctct1 ctct1._domainkey.gov.uk RSA 512-bit too small none Constant Contact
ctct2 ctct2._domainkey.gov.uk RSA 512-bit too small none Constant Contact
sp sp._domainkey.gov.uk RSA 512-bit too small none generic
proddkim proddkim._domainkey.gov.uk RSA 512-bit too small none generic
prod prod._domainkey.gov.uk RSA 512-bit too small none generic
test test._domainkey.gov.uk RSA 512-bit too small none generic
beta beta._domainkey.gov.uk RSA 512-bit too small none generic
mimecast mimecast._domainkey.gov.uk RSA 512-bit too small none Mimecast
mimecast20200928 mimecast20200928._domainkey.gov.uk RSA 512-bit too small none Mimecast
mimecast20230101 mimecast20230101._domainkey.gov.uk RSA 512-bit too small none Mimecast
mc mc._domainkey.gov.uk RSA 512-bit too small none Mimecast / Mailchimp
dkim2 dkim2._domainkey.gov.uk RSA 512-bit too small none generic
selector3 selector3._domainkey.gov.uk RSA 512-bit too small none Microsoft 365
everlytickey1 everlytickey1._domainkey.gov.uk RSA 512-bit too small none Everlytic
everlytickey2 everlytickey2._domainkey.gov.uk RSA 512-bit too small none Everlytic
eversrv eversrv._domainkey.gov.uk RSA 512-bit too small none Everlytic
mxvault mxvault._domainkey.gov.uk RSA 512-bit too small none MxVault
sig sig._domainkey.gov.uk RSA 512-bit too small none generic
sendinblue sendinblue._domainkey.gov.uk RSA 512-bit too small none Brevo (Sendinblue)
brevo brevo._domainkey.gov.uk RSA 512-bit too small none Brevo
mailerlite mailerlite._domainkey.gov.uk RSA 512-bit too small none MailerLite
ml1 ml1._domainkey.gov.uk RSA 512-bit too small none MailerLite
omnisend omnisend._domainkey.gov.uk RSA 512-bit too small none Omnisend
drip drip._domainkey.gov.uk RSA 512-bit too small none Drip
braze braze._domainkey.gov.uk RSA 512-bit too small none Braze
iterable1 iterable1._domainkey.gov.uk RSA 512-bit too small none Iterable
iterable2 iterable2._domainkey.gov.uk RSA 512-bit too small none Iterable

Records

selector1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

selector2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

google._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

1984._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

default._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

dkim._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mail._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

email._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

key1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

key2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

s1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

s2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

k1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

k2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

k3._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

smtp._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mx._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

x._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mandrill._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mailchimp._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sendgrid._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

s1024._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

smtpapi._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mailjet._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mailgun._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mg._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

krs._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

klaviyo._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sparkpost._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

scph0819._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

pm._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

pmta._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

hs1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

hs2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

hubspot._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sm._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sfmc._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sfdc._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

et._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

zendesk1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

zendesk2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

intercom._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

freshdesk._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

zoho._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

zohomail._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

amazonses._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

ses._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

protonmail._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

protonmail2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

protonmail3._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

fm1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

fm2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

fm3._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mesmtp._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

titan1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

titan2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

cm._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

dkimrnd._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mailer._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mailo._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

bounce._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

news._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

notify._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

noreply._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

support._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

info._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

ml._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

m1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sig1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sel1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sel2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

dk._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

dkim1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

ctct1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

ctct2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sp._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

proddkim._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

prod._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

test._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

beta._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mimecast._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mimecast20200928._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mimecast20230101._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mc._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

dkim2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

selector3._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

everlytickey1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

everlytickey2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

eversrv._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mxvault._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sig._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

sendinblue._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

brevo._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

mailerlite._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

ml1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

omnisend._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

drip._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

braze._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

iterable1._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

iterable2._domainkey.gov.uk

v=DMARC1;p=reject;rua=mailto:govuk-rua@dmarc.service.gov.uk

A DKIM key on its own proves nothing about a message — it has to be signed with, and aligned to, the From domain. Check this domain’s DMARC & SPF, or paste a real message’s headers to see whether signing actually happens.