Unable to send out email on port 25 Print

Many large ISPs (Cableone, Comcast, Verizon, Time Warner, etc) block port 25 connections to prevent computers within their network from connecting to servers outside of their networks.

The majority of spam (unsolicited email) on the Internet is caused by malicious software viruses that take control of infected computers. Often times the user never knows their computer has been infected until their account has been suspended. These viruses direct the infected machines to send email through port 25. ISPs takes spam very seriously, and block outgoing connections on port 25 to prevent infected computers from being used by spammers to send unsolicited email. Outbound port 25 blocking is a standard industry method to control spam.

In the Outgoing mail (SMTP) try port 26

How to Configure Outlook Express to use port 26, 465 or?587 for sending email

1. Open your Outlook Express, select the Tools menu and from the drop-down list select Accounts.
2. Next, select the Mail tab then choose your email account and click Properties.
3. After selecting Properties, the Mail Properties window will appear. Select the Advanced tab on the far right portion of the window.
4. From the Advanced tab, review the area underneath Server Port Numbers. In the Outgoing mail (SMTP) field enter the number: 26, 465 or 587.
5. Once you are finished, select OK.

How to Configure Outlook to use port 26, 465 or?587 for sending email

1. Open your Outlook, select the Tools menu and from the drop-down list select Account Settings.
2. The Account Settings window will open displaying the Email tab. Click to highlight your email account and then select Change.
3. From the Change Email Settings screen, select More Settings from the lower right-hand portion of the window.
4. From the Internet Email Settings window, select the Advanced tab.
5. From the Advanced tab, review the area underneath Server Port Numbers. In the Outgoing server (SMTP) field enter the number: 26, 465 or 587.
6. Once you are finished, select OK.

How to Configure Thunderbird to use port 26, 465 or?587 for sending email

1. Open Thunderbird, select the Tools menu and from the drop-down list select Account Settings.
2. From the Account Settings window, in the left-hand column, select Outgoing Server (SMTP) and from underneath the Ougoing Server (SMTP) Settings area of the window on the right, select Edit?.
3. In the SMTP Server window, enter 26, 465 or?587 in the Port: field.
4. When you are finished, select OK.

How to Configure Entourage (Mac Mail) to use port 26, 465 or?587 for sending email

1. Open Entourage, select the Tools menu and from the bottom of the drop-down list select Accounts.
2. On the Accounts window under the Mail tab, click on your email account to highlight and then select Edit.
3. The Edit Accounts window should appear opened to the Account Settings tab.
4. In the Override default SMTP port: field enter 26, 465 or?587, then select OK.



Once your Outgoing SMTP port has been changed, try sending/receiving email once more. If you continue to have problems. please open a trouble ticket with Technical Support.