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My ISP is blocking everything, how can I still send email?


Short answer: Yes you can!

Most Internet Service Providers block tcp port 25 for addresses outside their own network.
Port 25 is used for sending out email from your computer to smtp servers, who will in return deliver your email to the correct receivers mail server.

Although Travel SMTP does not use port 25 (but uses other default port numbers like 465 and 587), it may still be possible your computer cannot reach us. This can happen in hotels for example, who often have tight firewalls that only allow general internet traffic (visiting websites). Also in some areas like China or Africa, you may find ISP's that want to control outgoing traffic and are blocking everything except internet traffic to websites.

In case where everything is blocked except "normal" internet activity (like visiting websites), we have dedicated smtp servers running on ports 80 and 443. Port 80 is normally used for http (internet) traffic, whereas port 443 is by default used for encrypted and secure https connections. Our server will "pretend" that it is a normal webserver, so your traffic will not be blocked. In order to use this configuration, you must not only change the port number in your email configuration settings, but also the smtp address:

­ Address: Port number: Encryption:
1. SSL connection: smtp.travelsmtp.com 465 SSL
2. TLS or plain connection: smtp.travelsmtp.com 587 STARTTLS or no encryption
3. TLS or plain connection: smtp.travelsmtp.com 2525 STARTTLS or no encryption
4. Anti-firewall (no blocking):­ smtp80.travelsmtp.com 80 STARTTLS or no encryption
5. Anti-firewall (no blocking):­ smtp80.travelsmtp.com­ 443 SSL


Because the fourth and fifth options are not according the RFC standards, our advice is to only use this configuration when you absolutely need it. Don't forget to always use your Travel SMTP login information (user ID and password) in order to be able to connect to the Travel SMTP server. For instructions how to change these settings for your email software, click here.

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