Hi,
We are experiencing an issue when we send free text invoices in batch (around 300-400 in one go) and some of the emails fail to send with the below error:
/>>> Sending email message has failed (host: smtp.mailgun.org; port: 587; trusted connection: True). The SMTP server has unexpectedly disconnected.”
Does anyone know how to solve this? Could it be because of sending limits per minute?
Thanks