Are there any email sending limits?

There's no limit to how many emails you can send using Wavo. However you may be subject to limitations placed on your email account by your email provider.

For example, Gmail (free) is limited to 500 emails per day, Google G Suite: 2000 emails/day with the condition of not being in trial period and with a minimum $30 paid balance. Office 365's Outlook has a limit of 10 000 emails/day. But make sure to never send anything close to those limits before warming up your email account correctly for at least 30 days, or preferably 60 days.