Some Internet service providers have blocked access to SMTP port 25 for sending mail. These ISP users will receive errors when they try to send mail with an email client configured to use SMTP Authentication on port 25. Some users will be able to send mail by by configuring their email client to send mail on port 587 instead.
Disclaimer: This configuration is not guaranteed to work for all users. If you configure your client using the instructions below and continue to have sending problems, please view WiscMail - Cannot Send Mail From Off-Campus Networks.
Use the documents referenced below to configure your e-mail client but make the change specified.
In step 15 of the documents below, make sure that the Port number is set to 587 instead of 25.
In step 18 or 19 of the documents below, confirm that the Outgoing Server (SMTP) port is set to 587 instead of 25.
In step 7 of the documents below, confirm that the Outgoing Server (SMTP) port is set to 587 instead of 25.
In step 7 of the documents below, confirm that the Outgoing Server (SMTP) port is set to 587 instead of 25.
Outlook 2000 and Outlook Express do not work with SMTP port 587 - please try configuring your client to use port 465 instead.
In step 14 of the documents below, make sure that the Port number is set to 587 instead of 25.
Perform the following:

Perform the following:

In step 8 of the documents below, under the Outgoing Mail Server directions, check the box labeled Override default SMTP port and change the port number to 587.
Entourage X does not work with SMTP port 587 - please try configuring your client to use port 465 instead.
Follow the directions below to configure your client.
...And do the following:
If the window does not pop up, try the following:
Follow the directions below to configure your client.
...And do the following:
| Keywords: | wiscmail email sending smtp smtpauth authentication port 25 587 tds alternate different block dsl failed | Doc ID: | 2786 |
|---|---|---|---|
| Owner: | Ara M. | Group: | WiscMail |
| Created: | 2004-04-20 | Updated: | 2008-07-08 |
| Sites: | Help Desk, WiscMail | ||