# encoding: utf-8
# api: powershell
# title: Approve-MailAddress
# description: Checks a given Mail Address against a REGEX Filter to see if it is RfC822 complaint
# version: 0.1
# type: function
# author: Joerg Hochwald
# license: CC0
# x-poshcode-id: 6431
# x-archived: 2016-08-09T21:55:10
# x-published: 2016-07-01T04:36:00
#
# Not directly related is the REGEX check. Most mailer will not be able to handle it if there are non standard chars within the Mail Address…
#
#requires -Version 2
#region Info
<#
#################################################
# modified by : Joerg Hochwald
# last modified : 2016-06-28
#################################################
Support: https://github.com/jhochwald/NETX/issues
#>
#endregion Info
#region License
<#
Copyright (c) 2012-2016, NET-Experts <http:/www.net-experts.net>.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
THE POSSIBILITY OF SUCH DAMAGE.
By using the Software, you agree to the License, Terms and Conditions above!
#>
#endregion License
function global:Approve-MailAddress {
<#
.SYNOPSIS
REGEX check to see if a given Email address is valid
.DESCRIPTION
Checks a given Mail Address against a REGEX Filter to see if it is
RfC822 complaint
Not directly related is the REGEX check. Most mailer will not be able
to handle it if there are non standard chars within the Mail Address...
.PARAMETER Email
e.g. "joerg.hochwald@outlook.com"
Email address to check
.EXAMPLE
PS C:\> Approve-MailAddress -Email:"No.Reply@bewoelkt.net"
True
Description
-----------
Checks a given Mail Address (No.Reply@bewoelkt.net) against a REGEX
Filter to see if it is RfC822 complaint
.EXAMPLE
PS C:\> Approve-MailAddress -Email:"Jörg.hochwald@gmail.com"
False
Description
-----------
Checks a given Mail Address (Jörg.hochwald@gmail.com) against a
REGEX Filter to see if it is RfC822 complaint, and it is NOT
.EXAMPLE
PS C:\> Approve-MailAddress -Email:"Joerg hochwald@gmail.com"
False
Description
-----------
Checks a given Mail Address (Joerg hochwald@gmail.com) against a
REGEX Filter to see if it is RfC822 complaint, and it is NOT
.EXAMPLE
PS C:\> Approve-MailAddress -Email:"Joerg.hochwald@gmail"
False
Description
-----------
Checks a given Mail Address (Joerg.hochwald@gmail) against a
REGEX Filter to see if it is RfC822 complaint, and it is NOT
.NOTES
Internal Helper function to check Mail addresses via REGEX to see
if they are RfC822 complaint before use them.
.LINK
NET-Experts http://www.net-experts.net
.LINK
Support https://github.com/jhochwald/NETX/issues
#>
[CmdletBinding()]
[OutputType([bool])]
param
(
[Parameter(Mandatory = $true,
HelpMessage = 'Enter the Mail Address that you would like to check (Mandatory)')]
[ValidateNotNullOrEmpty()]
[Alias('Mail')]
[System.String]$Email
)
BEGIN {
# Old REGEX check
Set-Variable -Name 'EmailRegexOld' -Value $("^(?("")("".+?""@)|(([0-9a-zA-Z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-zA-Z])@))(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,6}))$" -as ([regex] -as [type]))
# New REGEX check (Upper and Lowercase FIX)
Set-Variable -Name 'EmailRegex' -Value $('^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*(\.[a-zA-Z]{2,6})$' -as ([regex] -as [type]))
}
PROCESS {
# Check that the given Address is valid.
if (($Email -match $EmailRegexOld) -and ($Email -match $EmailRegex)) {
# Email seems to be valid
Return $true
} else {
# Wow, that looks bad!
Return $false
}
}
}