I can receive emails, but not send them. The error message says that my server does not recognize my email account. What can I do to be able to send emails since I am receiving them? John

check your internet..

Hi! This is Alex Walker expert to help you to fix this issue for you call me on +1(518)348-9393 Thank you

See if steps 1 & 2 help you...
http://answers.microsoft.com/en-us/windowslive/forum/livemail-email/how-can-i-solve-synchronization-send-and-receive/dee0c2d9-998c-472e-aac9-0374c082854b

Check for a typo in the SMTP server address. You might also try smtp.googlemail.com instead (port 465 SSL). I've seen both used.

Typically this error indicates that you are trying to send your Adhost email through Adhost’s mail server when you have not authenticated your email account to send mail. Our mail server authenticates you through your pop account. So when you check your email, our mail server authenticates your pop user and password, captures that IP that you are checking your email from, and adds that IP to our relay list. This list is flushed every 70 minutes. This means, if you try to send email after the relay list has been flushed and before you’ve attempted to check your email, you will receive this error.


How to fix the problem:

Fix #1 - reauthenticate on our server.

Remove any email from your Outbox. If you need to keep the message, you can move it to your 'Drafts' folder.
Click "Send/Receive". This will reauthenticate you.
Try resending the email.
Fix #2 - configure your email client to check for email before sending.

In Outlook, go to "Tools" and select "Email Accounts". Make sure "View or change existing e-mail accounts" is checked. Click Next.
Select your account from the list and click "Change".
Select "More Settings".
Select "Outgoing Server".
Check "My outgoing server (SMTP) requires authentication".
Select "Log on to incoming mail server before sending mail".
Click "OK", then "Next", then "Finish".

This will fix your problem
Or
Call Yahoo! Customer Service

USA: 1-866-562-7219 --- 1-800-318-0631
UK 020 7131 1000
Canada: 1-877-722 3755
Direct Number: 1-408-349-1572

Regards
manish

Yes you can and please follow the settings that is listed below.

1. In Entourage, Click the Tools Menu

2. Select Accounts

3. Click New

4. Select IMAP from the Account Type Drop Down

5. Click OK

6. Select the Account Settings Tab

7. In the Account Name field, enter a meaningful label that will help you

recognize the account (i.e. USA.NET)

8. Place a check in the box labeled Include this account in my 'Send & Receive

All' schedule

9. Enter your Name and your full Email address in the respective fields

10. Under Receiving Mail, enter the following information:

a. Account ID: your full email address (i.e. [email protected])

b. IMAP server: imap.postoffice.net

c. Password: your password for your USA.NET account

11. Under Sending Mail, in the SMTP server field, enter smtp.postoffice.net

12. Click the button marked Click here for advanced sending options

13. Place a check in the box labeled SMTP server requires authentication

14. Select Use same settings as receiving mail server

15. Close this window

16. *Optional* If you wish to leave a copy of your email on the USA.NET server and

have them deleted only when you
delete them from Entourage:

a. Select the Options Tab

b. Place a check in the box labeled Leave a copy of each message on the server

c. Place a check in the box labeled Delete messages from the server after they are

deleted from this
computer

17. Click OK


I’m happy to assist further over the phone at https://www.6ya.com/expert/ramy_d9e7ebea3891f482

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.

Hi,
It seems that there is some problem with your settings. Goto account settings-> select the email account -> advanced settings of Outgoing server tab. Removing the check mark present near something like "SSL connection". save it and try again. Also verify other ports and outgoing server address by checking with your email provider.
i hope this is helpful to you

After deleting and recreating an account in Mail, you might not be able to send emails even if you can receive them. When you try to send a message, this alert may appear:
"Cannot send message using the server smtp.xxxxx.com"
This happens if the Simple Mail Transport Protocol (SMTP) server, used for outgoing messages, was incorrectly entered with the first account even if it was correctly entered for the replacement account.
Products Affected Mail
Resolution You should first verify that the network connection you're using is the correct one for the ISP that you want mail to communicate with.

1. Open Mail.
   
2. From the Mail menu, choose Preferences
   
3. Click Accounts.
   
4. On the Outgoing Mail Server (SMTP) pop-up menu, choose Edit Server List.
   
5. Delete all entries for the SMTP server that is mentioned in the error, and click Done.
   
6. Configure the current SMTP server by clicking Server Setting.
   
   Note: If you need to use multiple SMTP servers for multiple Mail accounts, see this document.
   
7. Send a test message to your email address.