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Email validation Test cases

These are most useful email validation test cases which is useful for most of the organizations because most of the websites has login functionality and that website need all email validations.

Valid Email address Reason
email@domain.com Valid email
firstname.lastname@domain.com Email contains dot in the address field
email@subdomain.domain.com Email contains dot with subdomain
firstname+lastname@domain.com Plus sign is considered valid character
email@123.123.123.123 Domain is valid IP address
email@[123.123.123.123] Square bracket around IP address is considered valid
“email”@domain.com Quotes around email is considered valid
1234567890@domain.com Digits in address are valid
email@domain-one.com Dash in domain name is valid
_______@domain.com Underscore in the address field is valid
email@domain.name .name is valid Top Level Domain name
email@domain.co.jp Dot in Top Level Domain name also considered valid (use co.jp as example here)
firstname-lastname@domain.com Dash in address field is valid
Invalid Email address Reason
plainaddress Missing @ sign and domain
#@%^%#$@#$@#.com Garbage
@domain.com Missing username
Joe Smith <email@domain.com> Encoded html within email is invalid
email.domain.com Missing @
email@domain@domain.com Two @ sign
.email@domain.com Leading dot in address is not allowed
email.@domain.com Trailing dot in address is not allowed
email..email@domain.com Multiple dots
あいうえお@domain.com Unicode char as address
email@domain.com (Joe Smith) Text followed email is not allowed
email@domain Missing top level domain (.com/.net/.org/etc)
email@-domain.com Leading dash in front of domain is invalid
email@domain.web .web is not a valid top level domain
email@111.222.333.44444 Invalid IP format
email@domain..com Multiple dot in the domain portion is invalid