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How to send email using port 587 instead of port 25

There are two main reasons why you should use port 587 instead of port 25 to send email using authenticated SMTP.

1. Some Internet service providers such as AOL and Orange block access to 3rd party mailservers on port 25. As a result, you will need to send E-mail to our servers using "Authenticated SMTP" on port 587.

2. Some Internet service providers provide dynamic IP address ranges which often appear on spam blacklists which prevent you from using port 25.

To change the outbound port from 25 to 587, first set authenticated SMTP using this FAQ: Setting the SMTP server (Outbound Mail Server address) in your e-mail settings
Then change the port from 25 to 587 using the instructions below.

Outlook Express

  1. Open Outlook Express.
  2. From the Outlook Express Tools menu, click Accounts
  3. Click the Mail tab
  4. Select your email account
  5. In the Properties dialog box, click the Servers tab
  6. Click the Advanced tab
  7. View the Outgoing mail (SMTP) Port
  8. Change the port from 25 to 587 and save changes.

Outlook 2000

  1. Open Outlook 2000
  2. Click the Tools menu and then click Accounts
  3. Select your email account
  4. Click Properties
  5. In the Properties dialog box, click the Servers tab
  6. Click the Advanced tab
  7. View the Outgoing mail (SMTP) Port
  8. Change the port from 25 to 587 and save changes.

Outlook 2002/2003

  1. Open Outlook 2002/2003
  2. On the Tools menu, click E-mail Accounts
  3. Click View or change existing e-mail accounts
  4. Select your email account
  5. Click Change
  6. Click More Settings
  7. Click the Advanced tab
  8. View the Outgoing mail (SMTP) Port
  9. Change the port from 25 to 587 and save changes.

Outlook 2007

  1. Open Outlook 2007
  2. On the Tools menu, click Account Settings
  3. Make sure the "Email Tab" is selected.
  4. Select your email account so it's highlighted, and click the Change icon above it.
  5. Click More Settings
  6. Click the Advanced tab
  7. View the Outgoing mail (SMTP) Port
  8. Change the port from 25 to 587 and save changes.

Entourage

  1. Open Entourage
  2. On the Tools menu, click Accounts.
  3. Select your email account
  4. Click Edit
  5. On the Account Settings tab, in the Sending Mail section, click “Click here for advanced sending options.”
  6. View the Outgoing mail (SMTP) Port
  7. Change the port from 25 to 587 and save changes.

Thunderbird

  1. Open Thunderbird
  2. On the Tools menu, click Account Settings.
  3. Select Outgoing Server (SMTP)
  4. Change the port from 25 to 587 and save changes.

Eudora

  1. Open Eudora
  2. Open Eudora
  3. Scroll down in the navigation pane and click Ports.
  4. View the Outgoing mail (SMTP) Port
  5. Change the port from 25 to 587 and save changes.

Mac Mail

  1. Open Mac Mail 
  2. From the Mail menu, choose Preferences.
  3. Choose Accounts
  4. Select your .Mac account in the list on the left
  5. Click the Server Settings button towards the lower right side of the window.
  6. In the Server Port field of the new window, change the port from 25 to 587 and save changes.
 
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