We are blocking network traffic on port 25 (e-mail) because our provider forces us to avoid spam e-mail.
How to get it to work anyway:
1. You can use an alternative port (e.g. AUTH-SMTP tcp/587)
2. You can use encrypted authentication (SSL/TLS) over port tcp/465
3. Use the provider's webmail service
4. Use mail.belwue.de as outgoing mailserver on port 25 or 587
We recommend the second possibility.
