
It also has the benefit of flagging emails if you’re typing entries into the Excel sheet. The second solution is more advanced but will find more invalid entries. Other times, the reverse would happen where people used “shift 2” or instead of the sign.” This is a tactic some people use online to prevent email bots from scraping their addresses. For example, some people would type some combination of “do not send email.” This tends to happen if your user input form doesn’t do field validation. " and “ are present, but it is still invalid since a second period is needed between “example” and “com.”Īfter doing this exercise, I did see some other patterns. Unfortunately, the rules aren’t perfect as you may still get some incorrect ones that slip through, such as In this example, both the “. You can either delete them or try to make corrections. Once you click OK, Excel will show the emails that don’t have either the sign or a period. Pin A filtered list of invalid email addresses Pin Creating custom autofilter with OR logic Make certain to use the Or radio button option.

All country codes are two letters, and then there are TLDs like.

The top-level domains are not always 3 letters like.
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For example, Gmail allows you to use the plus sign for their version of disposable email addresses. They can contain the “ +” sign even though many systems disallow this character.


In doing some research, I also noticed more possibilities for valid email addresses than I realized. I didn’t want to take that path, as I’m not a coder.
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I’m sure there may be a way someone could write Excel code to validate email addresses using regular expressions or syntax rules. The problem is email formats have some complex rules that may require another Excel feature called Data Validation. Like the Google function, it is easy to do, but not 100% reliable. The first solution is easy and filters for various characters. I looked through the online Excel functions list from Microsoft. You might think of this as data cleansing.Įxcel offers two ways to check for invalid emails, but it doesn’t use a predefined function like ISEMAIL, which is found in Google Sheets. Instead, they wanted to make sure the data record had the correct email address format. They weren’t looking for Excel to show that the account existed. Both individuals wanted to find email addresses using improper formats before sending out the emails.
