Cannot sendout emails. Can receive and open emails, but when I try to send I get an error message about suspecious activity, etc. Gives me a code which I type in, then I get the same message, This is the 3rd day of such nonsense.

Hello -

Apparently, you will need to revise the email you are trying to send.

From:
https://help.yahoo.com/kb/SLN5067.html

Error: 554 Message not allowed - [numeric code]

You'll receive an SMTP error or failed delivery message that includes "554 Message not allowed" when the content of a message you're trying to send violates Yahoo Mail policies. Content that violates policies includes; objectionable links, malicious attachments, or bad header information.

Review the Yahoo Mail and Yahoo Messenger Terms of Service to learn more about Yahoo policies that can effect your ability to send messages to Yahoo Mail accounts.
If you're the administrator for the mail server in question, review your outgoing messages for obectionable content or practices.
+++

How did I find this information? I used my favorite search engine, Google, and entered this search phrase, using quotation marks as shown:
"Yahoo mail" "Error 554"

How hard was that?

Best wishes.

Problem loading message: Error Code 45If you received an error code 45 when attempting to load a message, you'll need to contact us to resolve this error.
To contact Yahoo about receiving an error code 45 message:

1. Select Contact Customer Care on this page to go to the help form.
2. In the form, select:
   1. Your version of Yahoo Mail
   2. Category: Notices and errors
   3. Sub-category: Received temporary error code
3. Provide these details for at least one message that produced this error:
   • Contact name and email address
   • Date message was received
   • Message subject line
   • The folder containing the email (Inbox, Spam, etc.)
   • How you attempted to open the message when the error displayed (from a folder, from email search results, etc.)

When you use Microsoft Outlook Express to send and receive mail to a Post Office Protocol 3 (POP3) or Internet Message Access Protocol (IMAP) server running Exchange 2000 Server or Exchange Server 2003, you may receive the following error message. Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity.

Some internet companies will lock your account if you have sent out an unusually high volume of emails. This is to prevent spamming. If you haven't been sending an unusually high number of emails someone may have hacked your account. You will need to contact Yahoo to get this issue resolved.

Before you can send or recieve email, you must activate your GPRS and MMS account. Contact your SIM card provider to send you activation of GPRS and MMS. They usually will send us application to install the activation, including APN, server address etc. If the activation success, you can start to browse internet and other packet data, not only emailing, you can open facebook, twitter etc.

Hope this help, and if helpful RATE please !

It will be that the receipient hasnt opened the email maeesage if you have receipt of message facility active, or that the email address you have is wrong or typed in incorrectly. Either way, if the message hasnt reached the receipient's mail server then you wil get an error message saying this.

my did this. It is because your inbox or sent messages is full. you need to delete them. it might take a bunch of tries but it will work

If you have yahoo mail forwarding see: How do I verify my email address?

If you are getting error 533 , then see How to verify email addresses

If you use Outlook or Outlook express see:Why am I receiving an error when I send mail from Outlook

If instead ID/Password is not accepted read the following.

1. Ensure that User ID and password are correct.
2. Check if you have caps on, the password is case sensitive.
3. Try using a different computer or a different browser (eg. downloadOpera Browser).
4. Use Yahoo Password Recovery
5. See also Yahoo! Password Helper
6. If nothing worked, open a new account or contact Yahoo!

Hi Tech support,

I am unable to open yahoo mail from last couple of days. It gives an error message after logging in and no emails open.

pls help me

http://members.connectto.net/email/outlookexpress_0x800ccc0d.htm