Sending outreach emails to hundreds of contacts is fantastic. However, if you try to send to too many people at once, you might hit your email provider imposed rate limits. This means your account could be limited if you send a high volume of emails in a short period of time.
To prevent this from happening, we send the emails individually and space them out over time. That makes it look to Gmail, Outlook or your custom email provider like you’re sending the messages manually.
If you upload a recipient list with 300 recipients we’ll space out the sending. Replybutton sends between 5-10 emails in every 3 minutes like you are sending manually. Custom email providers may be slower according to their server speed.