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September 13, 2023 08:54
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an imperfect but simple email regex for CloudFormation AllowedPattern
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| ^\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 [email protected] style addresses | |
| # | |
| # | |
| # passing | |
| # | |
| [email protected] | |
| [email protected] | |
| [email protected] | |
| a-user@a_domain.co.uk | |
| [email protected] | |
| [email protected] | |
| [email protected] | |
| [email protected] | |
| [email protected] | |
| [email protected] | |
| [email protected] | |
| [email protected] | |
| user9801@domain_uk.com | |
| [email protected]_uk.com | |
| [email protected]_uk.com | |
| # | |
| # don't pass | |
| # | |
| @domain | |
| @domain.com | |
| user@ | |
| 🖖@domain.co.uk | |
| user@domain |
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