In an attempt to control unsolicited email (spam), some Internet service providers now block port 25, which means you could experience technical problems when sending email. If you are having trouble sending email, you may need to use port 465 (recommended) or 587 when sending email via Yahoo!'s SMTP server. (If your Internet connection is provided by AT&T or one of AT&T's partners, please read about AT&T's alternative SMTP settings.)

Learn more about SMTP errors.

Changing your port is as easy as changing a number in your SMTP setup. Learn how by selecting your email client from the list below.

• Microsoft Outlook 2002 (XP) and 2003
• Microsoft Outlook 98, 2000 and Outlook Express
• Netscape 7.1
• Eudora
• IncrediMail Xe

Microsoft Outlook 2002 (XP) and 2003

1. From the "Tools" menu, choose "E-mail Accounts."
2. Select "View or change existing e-mail accounts" and click "Next."
3. Select your Yahoo! POP account and click "Change."
4. Click the "More Settings..." button.
5. Click the "Advanced" tab.
6. Click the "This server requires an encrypted connection (SSL)" checkbox. (This step is not required if you choose to use port 587.)
7. Next to "Outgoing server (SMTP)," change port 25 to 465.
8. Click "OK," then click "Next" and "Finish."

Microsoft Outlook 98, 2000 and Outlook Express

1. From the "Tools" menu, select "Accounts."
2. Select your Yahoo! POP account and click on the "Properties" button .
3. Click the "Advanced" tab.
4. Under "Outgoing mail server (SMTP)," check the box next to "This server requires a secure connection (SSL)." (This step is not required if you choose to use port 587.)
5. Enter port number 465 (recommended) or 587 in the "Outgoing mail (SMTP)" field.
6. Click "Apply," then "OK" and "Close."

Netscape 7.1

1. From the "Windows" menu, select "Mail & Newsgroups."
2. From the "Edit" menu, select "Mail & Newsgroups Account Settings."
3. Scroll down and click "Outgoing Server (SMTP)."
4. On the window at right, nter 465 in the "Port:" field.
5. Change "Use secure connection" to "TLS" under "Outgoing Server (SMTP)."
6. Click "OK."

Eudora

Please visit the Eudora help center for instructions on changing the SMTP port to 465.

IncrediMail Xe

1. From the "Tools" menu, select "Accounts."
2. Select your Yahoo! POP account and click the "Properties" button.
3. Select the "Advanced" tab.
4. Under "Outgoing mail server (SMTP)," check the box next to "This server requires a secure connection (SSL)." (This step is not required if you choose to use port 587.)
5. Next to "Outgoing server (SMTP)," change port 25 to 465.
6. Click "Apply," then "OK" and "Close."