Validating email address using regular expressions is tricky and is often not recommended. A valid email address as defined by RFC 2822 can be quite complex.
A valid email is of the format: [email protected] The name can be a set of ‘atoms’ separated by dots. single or double quotes and any character inside the quotes Now, to the domain part. MUSEUM .travel, .international or even .vermögensberatung For example all the following email addresses are valid: Source The sad truth is that despite the complex regular expression validation, the email may not be existing, so can still be invalid for practical purposes.
panel displays information about each digital signature in the current document and the change history of the document since the first digital signature.
Each digital signature has an icon identifying its verification status.
The idea is to create a set of “validation descriptors” associated with each element in a form.
View example » Parsley is shipped with more than a dozen useful validators.
If not enough, use the awesome Parsley extra Ajax validator or tons of other extended validators provided by the community.
In its simplest form like this: [email protected], the atoms can contain 1. Most email validation checks assumes that the top level domain can have up to 4 characters. You have just validated the format – not its existence.
The only way to truly validate the email address is to send an email to that address and request the user to confirm by clicking on a unique link (or entering a confirmation code)Remember, if the user’s intention is to enter an invalid email address, she can do it so easily whether you have the most tough validation or not.