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rhiheu
Advocate III
Advocate III

Stronger Email Address Validation

Hi,

Does anyone know of a stronger version of email address validation than the out-of-the-box one? (IsMatch( [EmailAddressFieldName], Email).

In particular, I want to stop the following possibilities from being accepted:

Essentially, I would like if if the text input field accepted ONLY 1 valid email, and nothing else, no other characters, no other email addresses. Essentially anything that would stop a Power Automate email flow from running, that triggers from the form being submitted in the Power App (I'm not sure what Power Automate is using to decide the content in it's To/Cc/Bcc fields is valid before it decides to fail or not). I'm fine with it failing after Outlook attempts to send it (e.g. a valid email address but one that doesn't actually exist) because then it returns an error notification email back to the user who then knows how to deal with it. The trouble with it failing in Power Automate is the user can't see why.

Thanks 🙂

2 ACCEPTED SOLUTIONS

Accepted Solutions

Hi, 

 

You may use the below formula for Email Check 

If(And(IsMatch(TextInput2.Text,Email),Not(Find(" ",TextInput2.Text)>0),Not(Find(",",TextInput2.Text)>0),Not(Find("(",TextInput2.Text)>0)),"Good","Bad")

 

and set a error handler in flow by adding one more action of Email Send to User by add a Parallel branch Just down to your Email Option where you are using these mail id and from Option (...) of New Email action select the "Configure Run After"  Option and choose to "Has Failed". (see the attachment for reference)

 

Hope it will help you. 

 

 

View solution in original post

Hi @eka24 and @KrishnaV thanks for your replies but that wasn't quite what I was looking for sorry.

 

Hi @VDS_Mantra, that is great, thanks!! I've used your code and added a few more characters in just based on some of the failure examples I had:

If(And(IsMatch(TextInput2.Text,Email),Not(Find("(",TextInput2.Text)>0),Not(Find(")",TextInput2.Text)>0),Not(Find(",",TextInput2.Text)>0),Not(Find(":",TextInput2.Text)>0),Not(Find("<",TextInput2.Text)>0),Not(Find(">",TextInput2.Text)>0),Not(Find("[",TextInput2.Text)>0),Not(Find("]",TextInput2.Text)>0),Not(Find("\",TextInput2.Text)>0)), "Good","Bad")

Thanks for the error handling info too, I'll look into that as well.

 

I've learnt a lot more about email validation from this, it was a lot more complex than I expected, such as is described on Wikipedia (https://en.wikipedia.org/wiki/Email_address). I've decided to submit an idea too on the community to request a stronger inbuilt email validation function, if you're interested in voting for it the link is here.

View solution in original post

9 REPLIES 9
eka24
Community Champion
Community Champion

@rhiheu  Try:

On the Fill property

If(IsMatch(SearchBox.Text,"abc@gmail.com"),Blue,Green)
If i got you, you want only a particular email address nothing else example only "abc@gmail.com"
 
------------

If you like this post, give a Thumbs up. Where it solved your request, Mark it as a Solution to enable other users find it.

Hi @eka24, thanks for your reply. Sorry, I mean for it to accept any valid email and no other content in the field, not just abc@gmail.com.

In that case use:

IsMatch( "abc@gmail.com",Email)

Or

If(IsMatch(SearchBox.Text,Email),Blue,Green)

------------

If you like this post, give a Thumbs up. Where it solved your request, Mark it as a Solution to enable other users find it.

Hi, 

 

You may use the below formula for Email Check 

If(And(IsMatch(TextInput2.Text,Email),Not(Find(" ",TextInput2.Text)>0),Not(Find(",",TextInput2.Text)>0),Not(Find("(",TextInput2.Text)>0)),"Good","Bad")

 

and set a error handler in flow by adding one more action of Email Send to User by add a Parallel branch Just down to your Email Option where you are using these mail id and from Option (...) of New Email action select the "Configure Run After"  Option and choose to "Has Failed". (see the attachment for reference)

 

Hope it will help you. 

 

 

Hi @rhiheu ,

 

you can't control the user to enter the external domain emails. However, if you want to check within the domain you can do this:

If(IsBlank(LookUp(Office365Users.SearchUserV2().value, Mail = TextInput20.Text).Mail),"Not a Valid Email","Valid Email")

 
I hope this resolved your issue if you see any challenge/need further help please let me know I am always happy to do it for my community.

Regards,
Krishna
If this post helps you give a 👍 and if it solved your issue consider Accept it as the solution to help the other members find it more.

 



I hope this resolved your issue if you see any challenge/need further help please let me know I am always happy to do it for my community.

Regards,
KrishnaV
Business Applications MVP, Microsoft Certified Trainer
Twitter | Linkedin | YouTube | GitHub
If this post helps you give a THUMS-UP and if it solved your issue consider Accept it as the solution to help the other members / new members of the community.

Hi @eka24 and @KrishnaV thanks for your replies but that wasn't quite what I was looking for sorry.

 

Hi @VDS_Mantra, that is great, thanks!! I've used your code and added a few more characters in just based on some of the failure examples I had:

If(And(IsMatch(TextInput2.Text,Email),Not(Find("(",TextInput2.Text)>0),Not(Find(")",TextInput2.Text)>0),Not(Find(",",TextInput2.Text)>0),Not(Find(":",TextInput2.Text)>0),Not(Find("<",TextInput2.Text)>0),Not(Find(">",TextInput2.Text)>0),Not(Find("[",TextInput2.Text)>0),Not(Find("]",TextInput2.Text)>0),Not(Find("\",TextInput2.Text)>0)), "Good","Bad")

Thanks for the error handling info too, I'll look into that as well.

 

I've learnt a lot more about email validation from this, it was a lot more complex than I expected, such as is described on Wikipedia (https://en.wikipedia.org/wiki/Email_address). I've decided to submit an idea too on the community to request a stronger inbuilt email validation function, if you're interested in voting for it the link is here.

this is awesome, just adding this for anyone that needs to ignore blank spaces

Not(Find(" ",TextInputQ6_1.Text)>0)

Hi @rhiheu , what does Your code do and what does it compare the Email with? Are symbols included here, like that there must be no ( or / in email address?

iAm_ManCat
Most Valuable Professional
Most Valuable Professional

Hi,

 

You can use a simpler regex code to define only valid email addresses, I have examples in my blog for validating single email addresses, multiple separated by semi-colon - but definitely don't use Power Apps' Match.Email as this allows almost any combination of characters

 

Email validation in Power Apps - iAm_ManCat Blog (iammancat.dev)

 

Cheers,

Sancho


@iAm_ManCat
My blog


Please 'Mark as Solution' if someone's post answered your question and always 'Thumbs Up' the posts you like or that helped you!


Thanks!
You and everyone else in the community make it the awesome and welcoming place it is, keep your questions coming and make sure to 'like' anything that makes you 'Appy
Sancho Harker, MVP


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