Extract email id of specific domain extensions

Question

I need to extract email id from each row of specific domain extensions like .com .net .org everything else should be ignored. Below is the sample data of two rows.

    [email protected],[email protected],.@.,[email protected],.@.,[email protected],[email protected],[email protected],null.val@.@.,.@@,[email protected],[email protected],[email protected]
[email protected],[email protected],.@.,[email protected],.@.,[email protected],[email protected],[email protected],null.val@.@.,.@@,[email protected],[email protected],[email protected]

Whatever the first valid extension email matches is enough even though there are multiple id's only one email id is enough per row. Below is the sample desired result.

I believe this can be done with custom formula with regex but I can't wrap my head around it. I am using Desktop MS Excel latest version.

Answer 1

If your email addresses are relatively simple, you can use this regex:

\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b

In VBA:

Option Explicit
Function extrEmail(S As String) As String
    Dim RE As Object, MC As Object
    Const sPat As String = "\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b"
    
Set RE = CreateObject("vbscript.regexp")
With RE
    .Pattern = sPat
    .ignorecase = True
    .Global = False
    .MultiLine = True
    If .test(S) = True Then
        Set MC = .Execute(S)
        extrEmail = MC(0)
    End If
End With
End Function

Matching an email address can become very complicated, and a regex that follows all the rules is extraordinarily complex and long. But this one is relatively simple, and might work for your needs.

Explanation of Regex

Emailaddress1

\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b

Options: Case insensitive; ^$ match at line breaks

• Assert position at a word boundary \b
• Match a single character present in the list below [A-Z0-9._%+-]+
  • Between one and unlimited times, as many times as possible, giving back as needed (greedy) +
  • A character in the range between “A” and “Z” A-Z
  • A character in the range between “0” and “9” 0-9
  • A single character from the list “._%+” ._%+
  • The literal character “-” -
• Match the character “@” literally @
• Match a single character present in the list below [A-Z0-9.-]+
  • Between one and unlimited times, as many times as possible, giving back as needed (greedy) +
  • A character in the range between “A” and “Z” A-Z
  • A character in the range between “0” and “9” 0-9
  • The literal character “.” .
  • The literal character “-” -
• Match the character “.” literally \.
• Match a single character in the range between “A” and “Z” [A-Z]{2,}
  • Between 2 and unlimited times, as many times as possible, giving back as needed (greedy) {2,}
• Assert position at a word boundary \b

Created with RegexBuddy

EDIT: To match only specific domains, merely replace the part of the regex that matches domains with a group of pipe-separated domain names.

eg

\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.(?:com|net|org)\b