If you try to send out mail and it is not working, check if you use your own SMTP server (mail.yourdomain.tld) to send out mail. If this is the case, your provider may have choosen to block port 25 for outgoing mail, and you will need to use the SMTP server of your provider to send out mail.
Known providers in the netherlands who block port 25:
- Planet Internet
- Het Net
- OnsNet Nuenen
- OnsNet Eindhoven
Known providers in Malaysia who block port 25:
- TMnet
To change the SMTP Port, kindly refer to our knowledge base article as below:
http://www.040support.nl/client/knowledgebase.php?action=displayarticle&catid=2&id=83
