When I am sending an email there is always a block requesting me to enter a code before the mail is sent. They demand that it is to protect you. Why should yahoo refuse to send a mail unless that code is entered before one can continue? Should I always comply to this before my mail is sent? What is the grarantee that someone is sharing my email with me?

1) Do the parties have your correct email address. Test at least one of the parties by requesting they use the link in your email to reply to you rather than their contact list in one single email when you know they are online. If you get it from them and not the other parties, then just perhaps the others are sending to an old email address.

2) Have you searched all of your mail boxes? Sometimes a rule has been applied that filters your incoming mail and sends it to an unexpected mail box in rather than your primary mail box.

3) Have you checked your spam box. Most of us have had some mail sent to spam that was not.

4) Consider changing your password to your email.

5) Is no email coming your way or just mail from a particular party? Compose a letter to yourself and email it to your own email address. After all, no mistaking that address!

6) Have you installed any new security software? And, just maybe your own antiviral is blocking something malicious that has attached itself to an email sent your way.

7) Sometimes email gets stuck in a server somewhere on its way to you. For instance, if someone tries to send you an email with an attachment that is larger than what the email server allows, it gets stuck in their outbox and you don't get it. There may be NOTHING wrong on your end, in such a case.

I too recently had a problem signing into my Xbox Live account on the Xbox 360 after the latest security update. Microsoft has been "upping" their security protocols on all email accounts including those attached to Xbox 360 by requesting members to verify their Microsoft email accounts by requesting a Security "Code" that needs to be entered to validate their email address and password. Basically asking to confirm that the email account belongs to you and only you. This security is to protect members from their email accounts getting hacked into. This provided "code" by Microsoft is always sent to another email address you provide, or by them sending you a text message of the confirming "code" to your cel phone. (See picture) Once you receive this "code", you can enter it within the appropriate box and your email service, etc should be accessible both on your pc, etc and your Xbox 360. If you ignore the prompted requests eventually it will block you from opening your email even if you enter the correct password. Also, if your email address you entered into the Xbox Live account is a Hotmail, Bing or Live account, make sure that the option to have a secondary validation request is unchecked. (If you check the option even though it is provided by Microsoft as an extra security option, it conflicts with the Xbox settings. A Microsoft tech agent I spoke to about this problem confirmed this.)

Email Will Receive but Will Not Send b> According to the Radicati Group, a technology market research company, over 107 trillion emails were sent in 2010 -- that's roughly 294 billion emails a day. Moreover, the company estimates that there will be 3.8 billion email accounts by 2014. With so much activity, some users are sure to run into trouble when trying to send a message. If you are receiving emails but can't send them, it may be due to a number of issues, most of which you can quickly fix on your own.
SMTP Authentication b> Many email clients and providers require that your outgoing email messages are authenticated by an SMTP server prior to being sent. This authentication process adds an additional level of security and helps prevent junk mail from being sent out. If you have SMTP authentication disabled, however, your email will not be authenticated and will not be sent, even though you may still receive emails. To fix this issue, enable SMTP authentication by placing a checkmark next to the option in your email client or provider's Settings menu. b> Port 25 Blocking Port 25 is the port that is used to send email. Whenever you attempt to send an email, the email is routed through port 25 and the data is transmitted to remote email servers. If this port is blocked, you will be able to receive email but you will not be able to send it. Some Internet service providers block this port on their servers, so if you suspect that you are unable to send email because of port 25 blocking, contact your ISP and request that the port be unblocked. No Default Email Account b> If you do not have a default email account set up on your email client, and you haven't selected a specific account when composing the message, the client will not be able to deliver your email. A sent email must always be tied to an email account to protect other email users. To remedy this issue, specify a default account in the email client's Account Settings menu, or specify which account you want to send the email from when composing the message. b> Anti-Virus/Anti-Spam Scanner b> If you have an anti-virus or anti-spam scanner installed on your computer or as a plugin for your email client, it may be preventing your emails from being sent. This happens when the scanner times out while scanning an email for viruses or spam content, or when it detects what it believes to be a virus or spam while scanning the message. To remedy this issue, disable the anti-spam or anti-virus program, then send the message as normal.
Hope this helps.
b>

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.

Not in Yahoo Free Accounts.
However
Yahoo Mail Plus is what gives you use of capabilities to collect or send emails through
use of email clients.

You do it through POP account. Like through Outlook or other email client.
In My own Outlook to set it up. Go to Tools > Receipts Tab > Requesting Read Receipts
> (Check) Request a receipt for all sent messages. > Returning Read Receipts > Always
Send Read Receipt > Apply > Ok.

To check the exact reason - we have to follow few steps one by one as follows.

Due to following reasons mails may not reach their destinations,

Other End Problems
1. Email address typed is wrong or does not exist.
2. There is problem with the email address - like inbox capacity is full, incoming mail server is down.
3. Recipient received the email not in inbox rather in bulk/junk box - so tell him/her to check junk/bulk box.
4. Your email address is blocked by them (recipients).

Your End problem
-------------------------
5. You have not clicked the option "Server Authentication" or other configuration problem you made.
6. There is virus problem in your computer creating malfunction for outgoing emails.
7. Your outgoing server problem.

So I am guiding how to check all points one by one tactfully to detect exact reason.

First verify the email address you typed - then you send email to the same email address from your different email.
Try to use same mail server (your end) for checking as some time few black listed mail servers are there.
You request the recipient to check the bulk/junk box - or send email waiting few hours.
Tell the recipient whether your email is blocked or the domain of your email address (as yahoo.com is domain of email [email protected]).

Now this is the very important point out of the all points - please consult with your mail server admin and check whether you have checked the Server Authentication Required option in mail client software like Outlook Express.
You please configure the same email in different computer (virus free) - try the same.
Wait few ours and send to other email addresses - and check.

I think you may easily rectify the problem.
Happy Computing.
I think I have been able to answer to solve the problem. Many Many thanks for using Fixya.

Your message was not sent Your account...
Your message was not sent


Your account has been temporarily blocked from sending messages. This block can be caused by sending messages that trigger our spam filters, or by having too many recipients in one email. We encourage you to review the contents and recipient list of your message, and try sending it at after an hour or two. Doing so will usually resolve the matter.
If you are still unable to send messages after a 24-hour period, please read our FAQ for more information and to request Customer Care assistance.


We apologize for the inconvenience.



Thanks,

The Yahoo! Mail Team

Hi, It is not your fault that your mail to your friend entered spam. Email service providers usually have that issue especially yahoo. Gmail is better in that it accepts most mail without spamming then. Mails in spam folders are usually automatically deleted after some time on Yahoo. What you need to do is tell your friends who use Yahoo to include your name in their address books. That way, when they get mail from you, it will not enter spam. You can always check your "Sent" folder for a copy of the mail you sent earlier that didn't get to them.
Cheers.

Send problems. There are several common causes of problems with sending email:

• Mail queued. If you appear to be able to send email but it never arrives, it may be in a queue. Some applications put email in a queue when you send it, and the user has to manually send all queued mail to actually transmit it. Check your File and Edit menus for any queues, and also check the status of the email in the Out mailbox to see if it was actually sent -- if not, send it again.
  
  
• Send on check. This is a common problem -- many email servers are configured to use the password authentication involved with checking mail to allow the sending of mail, and therefore require clients to check for mail at the same time or just before sending mail. If you get an intermittent error message and can send at some times and not others, make sure the option "send on check" is enabled in your email settings. As a temporary fix, you can often solve the problem by manually checking for mail shortly (a few seconds or minutes) before sending mail. This problem can also produce the message "relaying not allowed" described below, for much the same reason.
  
  

• Relaying not allowed. Many Internet access providers require clients within their network to use their own servers for sending mail, as a policy intended to cut down on email spammers sending spam through other provider's servers. If you have more than one email address and can download mail without problems from a POP account with a different domain name than is used by your Internet access provider, but get the error "Relaying not allowed" when you try to send, then you probably need to set the outgoing SMTP server address to the mail server of your Internet service provider, instead of your email provider. Search your Internet network provider's home page or call technical assistance to obtain the address of their SMTP server, and enter it in your email client settings (first copy and save your existing server setting in case you need to set it back). This error message can also be produced by the "send on check" issue described in the bullet above.
  
  
• Server down. If you can do a successful connection check, and the above suggestions don't help, and a recipient continues to say that email sent from you does not arrive, and you are certain their address is spelled correctly, then one of the email servers between you and your destination is likely down. Blocked email is typically cached and sent when the missing server comes back up, usually within a few hours or days. If the problem persists and you can successfully send to other email addresses, then the email provider of your recipient is likely having a problem -- you should contact them by phone and ask them if they are getting email from anyone else, request they send an email to you, and if necessary suggest they do a connection check from their end to help diagnose the problem.

This is from this webpage.

http://www.livinginternet.com/e/et_connect.htm

Iam unable to send email from my computer. It is telling oops unable to perform your request.error code-008. please solve my problem-sumanthkumar