In addition, more ISPs are blocking port 25.
Service-smtp.fr is proposing several additional ports to address this problem.
Here is the list of available ports:
- Normal mode or TLS: 587, 25 5521, 5525, 7721 and 7725
- SSL mode: 465 and 5555
Thus service-smtp.fr is the ideal complement to an internal email server to your business (Small Business Server, etc…).