SMTP Settings
Non SSL SettingsSSL Settings
Incoming Server: mail.example.com
Outgoing Server: mail.example.com
Username: Your full e-mail address
Password: Your e-mail account password
Incoming Port: POP3 110 or IMAP 143
Outgoing Mail server (SMTP) Port: 587 or 25
SSL: NO
SMTP Authentication Required
Secure Authentication or SPA needs to be turned off
Incoming Server: mail.domain
Outgoing Server: mail.domain
Username: Your full e-mail address
Password: Your e-mail account password
Incoming Port: POP3 995 or IMAP 993
Outgoing Mail server (SMTP) Port: 465 or 587
SSL: YES
SMTP Authentication Required
Secure Authentication or SPA needs to be turned off

 

Checking if Port 25 is blocked


To test if port 25 is blocked, open your command line on your computer. For windows users, you can access this via start > run > cmd. Mac users can use the "Terminal" application. Once on the command line, type: (Note! Be sure that you replace example.com with your actual domain name)

telnet example.com 25


Please note: Telnet is disabled on newer versions of Microsoft Windows. If you receive an error similar to,"Windows cannot find 'telnet'", you may need to enable telnet.


To enable Telnet command line utilities:

  1. Click Start > Control Panel.
  2. Click Programs and Features.
  3. Click Turn Windows features on or off.
  4. In the Windows Features dialog box, check the Telnet Client check box.
  5. Click OK. The system installs the appropriate files. This will take a few seconds to a minute.


If you get no response or a failure, port 25 blocking is the likely issue. It is NOT port 25 blocking if you receive a response similar to this:

220-servername.220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.


Port 25 blocking - Fixes

Alternative Solution #1

Simply change your SMTP port number to 587. This setting is usually found in the advanced settings of your email client. Please see the end of this article for more details.



Alternative Solution #2

Use the secure, or SSL, port for outgoing mail. This will involve selecting the setting "this server requires a secure connection (SSL)" in your mail program. You only need to make this change for the outgoing mail server. Once you check that box, then change the port listing from 25 to 465 and save the changes.


How to update your SMTP port and SSL settings


In most email clients, the SMTP port and SSL settings are updated on the same settings page, and that page is generally in the advanced settings. The directions below will assist you in finding where to change these settings:


Outlook 2002 and Outlook 2003

  1. Start Outlook.
  2. On the Tools menu, click E-mail Accounts.
  3. Click View or change existing e-mail accounts, and then click Next.
  4. Click your account, and then click Change.
  5. Click More Settings.
  6. Click the Advanced tab.


Outlook 2007

  1. Start Outlook.
  2. On the Tools menu, click Account Settings.
  3. Click to select the target account, and then click Change.
  4. Click More Settings.
  5. Click the Advanced tab.


Outlook 2010

  1. Start Outlook 2010.
  2. Click Account Settings.
  3. Select the email account from the list and click Change.
  4. Click More Settings.
  5. Click the Advanced tab.


Outlook 2013

  1. Start Outlook 2013.
  2. Click Account Settings.
  3. Select the email account from the list and click Change.
  4. Click More Settings.
  5. Click the Advanced tab.


Windows Live Mail 2008, 2009, 2011

  1. Open Windows Live Mail.
  2. Click the Accounts menu, and click the Properties button.
  3. Click the Advanced tabYou can then update the port settings.


Mac Mail

  1. Open Mail.
  2. From the Mail menu, choose Preferences.
  3. In the Preferences window, click the Accounts button if it is not already selected.
  4. In the Accounts list, if you have multiple accounts, click your email account.
  5. Click the Server Settings button near the bottom of the pane.

Note! If you do not see a Server Settings button, click the drop down list, click "Edit Server List...", and click the "Advanced" tab.


iPhone 

  1. Unlock your phone and then click on the Settings icon
  2. Scroll down until you see Mail,Contacts,Calendars, then click on that line
  3. You will see the Accounts list. Click on the email account that you wish to update
  4. You will then see a page with the account name and two switch options for Mail and notes. Click on the Account line at the top to proceed
  5. Your next screen will display the IMAP/POP3 Account Information
  6. In order to change the Outgoing SMTP Settings, click on the SMTP line
  7. You will see the SMTP. Click on the Primary Server in order to change the existing settings, or click on Add Server to add a new SMTP server. NOTE: The following steps are for modifying the existing SMTP server.
  8. The Outgoing Mail server information will then be displayed. Click on the line that you wish to change, then click on Done in the top right of the screen in order to apply your changes.


Have you removed the mail profile and recreated it again? Note that this will delete all email


Remove the existing Outlook profile

  • Close the Outlook client
  • Open the Control panel
  • Select Large icons from the View by: list
  • Select the Mail Icon
  • Click the Show Profiles... button in the Mail Setup - Outlook Window
  • Highlight the profile and click Remove
  • Click the Yes button in the Dialog Box
  • Click the OK button


Create new Outlook profile

  • Launch Outlook
  • When prompted for a profile name type Outlook or any desired name
  • Make sure the proper user name and email address is populated and click next
  • When prompted for credentials, type the current password
  • Click Finish
  • If prompted, shut down and restart Outlook


Additional Questions to ask?

  • Is Your Attachment Too Big?
  • Have you disabled the anti-virus?
  • Verify all usernames and password
  • Have you checked that you are blocked for spam