Why Should I Avoid Capital Letters in Email Addresses and Other Online Forms?
All caps - Wikipedia
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11 English Capitalization Rules: How, When, and Why | YourDictionary
Email Basics: Email Etiquette and Safety
Is it ok to use uppercase letters in an email address? - Webmasters Stack Exchange
Do Capital Letters Matter in Email Addresses? | Wilson Media Consulting
Why letter casing is important to consider during design decisions | by Quovantis | UX Planet
Capital Letters in Formal Writing
Capital letters: avoid these 3 common errors - Concise Writing Consultancy
The Meaning of All Caps—in Texting and in Life | WIRED
Does Capitalization Matter In Email?
Are there capital letters in email addresses? - Quora
The Meaning of All Caps—in Texting and in Life | WIRED
A brief guide to capitalization rules - Writer
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How to Turn Off Auto-Capitalization of Words on Mac | OSXDaily
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Are Emails Case Sensitive? What You Need to Know
How Should You Capitalize Your Email Subject Lines? – HIPB2B
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