DNSCheckValidation returns an error message with transposed letters

[mowbr002]

No MX or A DSN record was found for this email
Should be:
No MX or A DNS record was found for this email

[egulias]

Hey, thanks for spoting the typo. Feel free to make a PR with the fix!

[caricare2]

I created a PR with the fix here as we ran into the same issue:
#395