Hello, If you are using a standalone email client like Outlook or Thunderbird, this is likely due to the fact we don't have any logs which means we have to block certain ports, SMTP 25 being one of them, which helps prevent spam messages from being sent using our VPN. Using webmail instead of an email client usually resolves this issue, or temporarily turning the VPN off when you need to send emails would also work, but I understand that's not an ideal solution. I'm sorry for the inconvenience. I hope you find this helpful, and let me know if you need anything else.