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rswift/email-regex.txt

Last active September 13, 2023 08:54
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an imperfect but simple email regex for CloudFormation AllowedPattern
Raw
email-regex.txt
^\b([a-zA-Z0-9][\.\-_a-zA-Z0-9]+)\b@\b([a-zA-Z0-9][\-_a-zA-Z0-9]+)\b\.{1}\b(.*)\b$
#
# not massively well tested, or spectacular, but it works for generally agreeable, mostly typical user@domain.tld style addresses
#
#
# passing
#
user@domain.co.uk
user.name@some-domain.com
user.name@some.domain.com
a-user@a_domain.co.uk
user9801@domain.co
user-name@domain.c
user.name@somedomain.com
user_name@domain.co.uk
user@42.com
user@42-24.com
user.name@domain42.com
42@domain.com
user9801@domain_uk.com
user9801@subdomain.domain_uk.com
user9801@sub-domain.domain_uk.com
#
# don't pass
#
@domain
@domain.com
user@
🖖@domain.co.uk
user@domain
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