Consider the customer’s time zone and business hours. Avoid sending emails late at night or on weekends unless it’s relevant. I also use cold emailing to boost sales. Cold emails can be used to generate leads, build a sales pipeline, and nurture relationships with potential customers who may not be aware of your business yet. Here you can find tips and useful tools for cold mailing and emails outreach
https://snov.io/. Automation can make it more productive.