Over the past few months we have observed that several clients with PLDT DSL, Smartbro, Globe, etc. as their Internet Service Provider (ISP) have been experiencing problems sending email via the their outgoing mail (SMTP) servers.
The source of the problem is local ISP blocked their TCP Port 25, a port which is used in sending email via the SMTP protocol.
After consultation with their respective technical staff, it was revealed that PLDT, Globe, and other ISP’s mail relay have been overburdened by the amount of outgoing mail. As a solution, they shut down their TCP Port 25 to prevent all outgoing mail altogether.
The problem can affect anyone who use local ISP, whether they host locally or abroad. Changing hosting providers will not remedy the situation.
We have setup an alternate SMTP server port for client to be able to send email through their email client like Outlook, Thuderbird, etc. You need to change your SMTP port setting to port 26.
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January 19th, 2009 at 4:07 pm
May i know if how can i change the smtp and configure it, like what the instructions below…
“We have setup an alternate SMTP server port for client to be able to send email through their email client like Outlook, Thuderbird, etc. You need to change your SMTP port setting to port 26″
February 24th, 2009 at 4:56 pm
I have tried to use port 26 but i still cant send mail.. any other suggestions?
February 24th, 2009 at 5:16 pm
what smtp will we be using? from yours?? or from our ISP’s?
February 26th, 2009 at 11:21 pm
It depends on your internet provider. Some provider allow anyone to use port 25 or 26 to be able to send email to any email client application. But some providers has restriction about using the said port for sending email. The best thing you can do is test it first if you are able to send email via port 25 or 26. If it fails, you should contact your internet provider about SMTP server you need to use in order to send email.
February 26th, 2009 at 11:24 pm
alternative SMTP port 26 will not work in our new hosting plans running on our new hosting zero downtime architecture.