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Trouble Sending Emails in Outlook?

We get a lot of inquiries from our Smarter Mail clients using Outlook who suddenly have trouble sending emails, but do not have problems receiving them. While there are obviously a number of issues that can cause this, by far the most common is the blocking of Port 25 by a client's ISP (Internet Service Provider). Comcast and Verizon are among those known to do this.

Below are some simple instructions to change to the alternate port 587 or as always you can contact our Help Desk for assistance. All new requests can be emailed to helpdesk@ag-is.com or at submitted at www.ag-is.com/contact/support. You can also reach us at 717-285-7105 x247.

 

Instructions

It is not uncommon for your ISP to change ports especially if you were using Port 25.

Mail server, incoming or outgoing = mail.ag-is.com

*** Optional - If you wish you may check if your Outlook settings are correct. ***

Outlook 2007

Outlook 2010 Add Accounts

Outlook 2010 Edit or Modify Accounts

 

*** Optional - If you wish you may check your Port. ***

To determine if the port is a reason you are having issues sending mail, you can attempt to connect to the SMTP port currently set in your email client to your mail server:

You may reference: http://www.hosting.com/support/email/telnet

If you are unable to connect on port 25, you may also try alternate port 587.

 

Changing Ports

Instructions below are for various versions of Outlook. ***

Microsoft Outlook 2007

  • From the main screen open the 'Tools' menu and then select 'Account Settings'
  • Select your email account from the list
  • Click the 'Change' button
  • Select the 'Outgoing Server' tab
  • Check 'My outgoing server (SMTP) requires authentication' (If not checked)
  • Click on the 'Advanced' tab
  • Change the 'Outgoing mail (SMTP)' port number to the alternate port 587
  • Click the 'Ok' button
  • Click the 'Next >' button then the 'Finish' button
  • Close Outlook and then reopen

Microsoft Outlook 2010

  • Go to the 'File' tab
  • Go to the 'Info' section
  • Click on 'Account Settings'
  • Click the drop-down button titled 'Account Settings'
  • Select your email account from the list
  • Click the 'Change' button
  • Select the 'Outgoing Server' tab
  • Check 'My outgoing server (SMTP) requires authentication' (If not checked)
  • Click on the 'Advanced' tab
  • Change the 'Outgoing mail (SMTP)' port number to the alternate port 587
  • Click the 'Ok' button
  • Click the 'Next >' button then the 'Finish' button
  • Close Outlook and then reopen

Microsoft Outlook 2003

  • Click Tools then Email Accounts
  • Make sure you have View or change existing e-mail accounts selected before you click Next
  • Highlight your POP3 account and click Change
  • Click More Settings then the Advanced tab
  • You should see Outgoing server (SMTP): which would have 25 set as default
  • Change the 25 to 587.
  • Click OK after you make your SMTP port change
  • Click Next, then Finish
  • Close Outlook and then reopen

Remember if you experience issues sending or receiving emails from Outlook you should log into your Web Mail account at http://webmail.ag-is.com and test sending emails or check your Inbox for new mail there. This will also allow you to keep in touch while the issue is resolved.

About the Author

Chris Farr

This post was written by Chris Farr

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