Email Validation Toolkit
# Email Validation Toolkit
# Function to validate email using a simple regex pattern
function Test-EmailSimple {
param (
[Parameter(Mandatory=$true)]
[string]$Email
)
$regex = "^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$"
return $Email -match $regex
}
# Function to validate email using a more comprehensive regex pattern
function Test-EmailComprehensive {
param (
[Parameter(Mandatory=$true)]
[string]$Email
)
$regex = "^(?!\.)(""([^""\r\\]|\\[""\r\\])*""|([-a-z0-9!#$%&'*+/=?^_`{|}~]|(?<!\.)\.)*)(?<!\.)@[a-z0-9][\w\.-]*[a-z0-9]\.[a-z][a-z\.]*[a-z]$"
return $Email -match $regex
}
# Function to validate email with domain check
function Test-EmailWithDomain {
param (
[Parameter(Mandatory=$true)]
[string]$Email
)
$regex = "^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$"
if ($Email -match $regex) {
$domain = ($Email -split "@")[1]
if (Resolve-DnsName -Name $domain -ErrorAction SilentlyContinue) {
return $true
}
}
return $false
}
# Function to validate multiple emails
function Test-MultipleEmails {
param (
[Parameter(Mandatory=$true)]
[string[]]$Emails,
[Parameter(Mandatory=$false)]
[ValidateSet("Simple", "Comprehensive", "WithDomain")]
[string]$Method = "Simple"
)
$results = @()
foreach ($email in $Emails) {
switch ($Method) {
"Simple" { $isValid = Test-EmailSimple -Email $email }
"Comprehensive" { $isValid = Test-EmailComprehensive -Email $email }
"WithDomain" { $isValid = Test-EmailWithDomain -Email $email }
}
$results += [PSCustomObject]@{
Email = $email
IsValid = $isValid
}
}
return $results
}
# Function to extract emails from text
function Get-EmailsFromText {
param (
[Parameter(Mandatory=$true)]
[string]$Text
)
$regex = "\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b"
return $Text | Select-String -Pattern $regex -AllMatches | ForEach-Object { $_.Matches.Value }
}
# Example usage
$testEmails = @(
"user@example.com",
"invalid.email@",
"another.user@example.co.uk",
"not_an_email"
)
Write-Host "Simple Validation:"
Test-MultipleEmails -Emails $testEmails -Method Simple | Format-Table
Write-Host "`nComprehensive Validation:"
Test-MultipleEmails -Emails $testEmails -Method Comprehensive | Format-Table
Write-Host "`nValidation with Domain Check:"
Test-MultipleEmails -Emails $testEmails -Method WithDomain | Format-Table
$sampleText = "Contact us at support@example.com or sales@company.co.uk for more information."
Write-Host "`nExtracting emails from text:"
Get-EmailsFromText -Text $sampleText
This toolkit includes the following functions:
Test-EmailSimple: Uses a simple regex pattern to validate email addresses.Test-EmailComprehensive: Uses a more comprehensive regex pattern for stricter validation.Test-EmailWithDomain: Validates the email format and checks if the domain exists.Test-MultipleEmails: Validates multiple email addresses using one of the above methods.Get-EmailsFromText: Extracts email addresses from a given text.
To use this toolkit, you can copy and paste the entire script into a PowerShell file (e.g., EmailValidationToolkit.ps1) and then dot-source it in your PowerShell session:
. .\EmailValidationToolkit.ps1