eCenica Hosting operate an improved SMTP service, commonly referred to as 'Roaming SMTP'. Roaming SMTP allows you to send e-mails using SMTP, regardless of the type of internet connection or ISP you are using at the time. This is achieved by running our SMTP servers over multiple ports, so even if your ISP blocks access to Port 25 (the default SMTP port), you will still be able to send mail.