You can have the best service, the most competitive pricing, and a perfect pitch — but if your emails look sloppy, you're losing clients before they even consider your offer.
Most professionals know the basics: don't use ALL CAPS, don't write novels, check your spelling. But there are subtler formatting mistakes that quietly undermine your credibility in every email you send.
Here are five that cost you more than you think.
1. Pasting Raw URLs Instead of Hyperlinks
This is the most common formatting mistake in professional emails, and most people don't even realize it's a problem.
When you paste a raw URL like this into an email:
https://www.canva.com/design/DAF82jdK3kP/view?utm_content=DAF82jdK3kP&utm_campaign=designshare
Your recipient sees a wall of random characters that looks like spam. It breaks the flow of your email, gives no context about what the link leads to, and signals that you didn't take the time to format things properly.
The professional move is a branded hyperlink: View Our Services Brochure
Same link. Completely different impression. Tools like Plinq let you save these formatted hyperlinks and paste them into emails with one click — so you're never tempted to take the ugly shortcut. For a deeper dive, read our post on why raw URLs make your emails look unprofessional.
2. Using a Free Email Address for Business
If your email still comes from yourbusiness@gmail.com instead of you@yourbusiness.com, that's one of the first things clients notice.
A custom domain email costs a few dollars a month through Google Workspace or Microsoft 365. It signals that your business is established, that you've invested in the basics, and that you're not a fly-by-night operation.
This is especially important if you're competing against more established businesses in your space. When a potential client is comparing two quotes side by side, the one from a professional domain email already has a head start.
3. Walls of Text With No Structure
People scan emails. They don't read them word by word — especially when they're busy.
If your email is one giant paragraph, most people will skim the first sentence and the last sentence and miss everything in between. That means your key points, your pricing, your call-to-action — all buried in a block of text nobody reads.
The fix:
- Keep paragraphs to 2-3 sentences max
- Use line breaks between sections
- Bold the most important information
- If you have multiple items, use a bulleted list
- Put your call-to-action on its own line so it stands out
4. A Weak or Missing Signature Block
Your email signature is free real estate. It's the last thing someone sees before deciding whether to respond, and it reinforces who you are.
A weak signature is just your name. A strong signature includes:
- Full name and title
- Company name
- Phone number
- Website link
- One or two social links (LinkedIn, etc.)
Don't go overboard — you don't need a quote, a banner image, and six social media icons. Keep it clean and informative. The goal is to make it easy for the recipient to learn more about you or contact you through another channel.
5. Inconsistent Formatting Across Emails
This one is subtle but it matters — especially if multiple people on your team are emailing clients.
If one email uses bullet points and the next uses numbered lists... if one email capitalizes the product name and the next doesn't... if your links are sometimes branded and sometimes raw URLs — it all adds up to an impression of "this business doesn't have its act together."
Consistency signals professionalism. It tells the client that your business has standards, even in something as small as an email. The best way to achieve this is to create templates or reusable assets (like a saved link library) that everyone on the team uses.
Why These Details Matter
None of these mistakes will tank a deal on their own. But combined, they create a pattern. When a potential client receives a poorly formatted email with a free Gmail address, raw URLs, and a wall of text, they're forming a judgment — whether they tell you or not.
And when they're comparing you against a competitor whose emails are polished, well-structured, and professional down to the hyperlinks, you're starting at a disadvantage.
The good news: these are all easy fixes. Domain email, structured paragraphs, proper signatures, and branded hyperlinks are simple changes that compound over every email you send. Learn how to create proper hyperlinks in your emails to start.