# How to constraint email address

**URL:** <https://forum.getodk.org/t/how-to-constraint-email-address/42620>\
**Category:** Support\
**Created:** [August 10, 2023, 1:49pm UTC](https://forum.getodk.org/t/how-to-constraint-email-address/42620 "2023-08-10T13:49:37Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![danbjoseph](https://getodk.b-cdn.net/user_avatar/forum.getodk.org/danbjoseph/32/21901_2.png) [@danbjoseph](https://forum.getodk.org/u/danbjoseph)\
**Post date:** [August 10, 2023, 4:44pm UTC](https://forum.getodk.org/t/how-to-constraint-email-address/42620/3 "2023-08-10T16:44:39Z")

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This is also a good explanation:

> [@Formatos para direcciones e-mail o direcciones de viviendas](https://forum.getodk.org/t/formatos-para-direcciones-e-mail-o-direcciones-de-viviendas/10335/3):
>
> My Spanish is not so bueno, but I agree with Jorge that you probably don't want to have strict constraints here. This is especially true with email addresses because the [email address specification](http://emailregex.com/email-validation-summary/) is maddening. For me, the best way to validate an email is to send an email to that address with a link inside and see if someone clicks that link. The next best way, especially if you are offline, is to make sure there is no obvious typo. So what I check is at least one non-whitespace character, fo…

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