Using Gmail for your business account can sometimes be perceived as spammy for several reasons:

Lack of Professionalism: A Gmail address (e.g., yourbusiness@gmail.com) may not convey the same level of professionalism as a custom domain email (e.g., info@yourbusiness.com). Clients and customers often associate custom domain emails with established and credible businesses, while generic Gmail addresses can appear less trustworthy.

Spam Filters: Emails sent from Gmail accounts can be more likely to end up in spam folders, especially if the recipient's email provider has strict filtering rules. This can happen if the email content triggers spam filters or if the sending domain has a poor reputation. Using a custom domain can help improve deliverability.

Branding Limitations: With a Gmail account, you miss out on opportunities for branding. Custom domain emails allow you to reinforce your brand identity with every communication, while a Gmail address does not provide that same level of visibility.

Limited Features for Businesses: While Gmail offers many features, it may lack some advanced functionalities that dedicated business email services provide, such as enhanced security, compliance tools, and customer support tailored for businesses. This can lead to inefficiencies and a less professional image.

Perception of Scale: Using a personal email service like Gmail can give the impression that your business is small or not serious about its operations. Larger companies typically use custom email domains, and using Gmail might suggest that your business is not on the same level.

Increased Risk of Phishing: Gmail accounts can be more susceptible to phishing attacks, which can compromise sensitive business information. If clients receive emails from a Gmail address, they may be more cautious and skeptical, fearing that it could be a phishing attempt.

Compliance Issues: Depending on your industry, using a personal email service may not comply with regulations regarding data protection and privacy. Businesses in sectors like finance or healthcare may be required to use secure, compliant email services.