If you are looking for a free business email which is domain specific then here is one of the best choice available for you. 
I ahve already shared about : 5 Steps to Build Amazing Email Lists from the Ground Up
Zoho
 Mail has free and paid versions. It`s free version is also interesting.
 So today we will discuss about how to setup your domain Email address 
using ZohoMail.
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| How to Create Free Business Email with ZohoMail in 5 minutes : eAskme | 
Other people are reading : 10 Ways To Market Your Website
How to Create Free Business Email with ZohoMail in 5 minutes
- Click on SignUp under FREE plan.
- Click on Add domain
- Fill up the sign-up form. 
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| How to Create Free Business Email with ZohoMail in 5 minutes : eAskme | 
- Confirmation for your sign up for free lite plan. 
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| How to Create Free Business Email with ZohoMail in 5 minutes : eAskme | 
Verifying Domain ownership on ZohoMail:
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| How to Create Free Business Email with ZohoMail in 5 minutes : eAskme | 
- Click on “Proceed to verify domain ownership”.
- Verify domain ownership page will open.
- Verify with any of these options “CNAME or TXT or HTML file upload“. 
- Now you will get Success message
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| Zoho configured Successfully : eAskme | 
Update MX record to complete Zoho business Email setup:
Click on Change MX record and you will see what MX record you need to use. If you are on hostgator you can see this:
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| Add MX record on Hostgator : eAskme | 
- Now go to Zoho domain setup and finish the process.
- Now you be on Zoho cPanel
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| domain email address : eAskme | 
Zoho also offers mobile apps.
So
 you should try ZohoMail to Create Free Business Email. If you are using
 any other service, do let me know via comments.