Mac OS 10.6.5 Mail 4.4 all the sudden I can not send any mail. I have checked all the normal items, have tried rebuilding my mailbox. We have 2 macs with identical operating systems. We did a box by box check on the mail to see if there was anything different. Nothing. The only thing I found strange was the mail application itself on my computer it says its size is 77.5 MB on the other computer its is only 17.9 and on mine the created date is 2/11/2010 and the other is 7/24/2009. Both computers were updated to 10.6.5 on 11/14/10. Just all the sudden on 12/3/10 my mail will not send. I can send it if I use the other mac. Suggestions???

Go to your Mail program, then in the top left corner, click on "Mail" then "Preferences" that will bring up your email accounts. Check the settings there to make sure everything is correct.

That might be that the data base for the emails is corrupted. There is an option for rebuilding the data base. Go to Mail, select the mailbox you have problems with and then from the top menu select Mailbox > Rebuild. Restart mail and see if that worked out...

If Mail opens normally, go to the Mailbox menu and select Rebuild at the bottom. This should fix any database corruption that could be causing the problem.
On my older (G3) Mac, a message with a long video attachment can take quite a while to load - the kaleidoscope cursor comes up until it is done opening the message. Try holding down the shift key while opening Mail - this stops the mailboxes from opening.

Hello Tan,

Select Menu > Applications > Mail. You can add several mailboxes and access them directly from your home screen. In the main mail view, you can switch from one mailbox to another. You can add several mailboxes to your device. Select Menu > Applications > Mail. Add a mailbox Select New mailbox, and follow the instructions.

You can use your device to write and send mail, and attach files to your mail. Select Menu > Applications > Mail.

1 Select .

2 To add a recipient from your contacts list, select the To, Cc, or Bcc icon. To enter a
mail address manually, select the To, Cc, or Bcc field.

3 To add an attachment to the mail, select .

4 To send the mail, select .

Connection Doctor would help here, but unfortunately Apple did not add this feature until 10.4. :-(
If I understand your problem correctly, you can send mail successfully, but trying later to access those messages in your Sent mailbox results in this error message. If you are using an IMAP account, you may need to visit Preferences / Accounts / Mailbox Behaviors and uncheck the box for "Store sent messages on the server." If you are using a POP account, it's possible the mailbox (or a Mail preference file) is simply corrupt and will need to be deleted and recreated. Unfortunately, the Panther and Tiger mail systems are known to be susceptible to certain types of corruption.

To set up access to a free Yahoo! Mail account in Mac OS X Mail:

* Install MacFreePOPs and make sure the freepopsd service is running.
* Select Mail | Preferences... from the menu in Mac OS X Mail.
* Go to the Accounts category.
* Click + at the bottom of the Accounts list.
* Type your name under Full Name:.
* Enter your full Yahoo! Mail address (e.g. "[email protected]") under Email Address:.
* Type your Yahoo! Mail password under Password:.
* Make sure Automatically set up account is not checked.
* Click Continue.
* Make sure POP is selected under Account Type:.
* Enter "Yahoo! Mail" under Account Description:.
* Enter "localhost" (without the quotation marks) under Incoming Mail Server:.
o If you run into problems using "localhost", try "127.0.0.1".
* Type your full Yahoo! Mail address ("[email protected]", for example) under User Name:.
o Mac OS X Mail probably has already entered your user name, and it's enough to append "@yahoo.com" to complete the address.
* Click Continue.
* Click Continue again, ignoring the error. We'll take care of that in a bit.
* Make sure Password is selected under Authentication:.
* Leave Use Secure Sockets Layer (SSL) unchecked.
* Click Continue.
* Select an existing mail server to send mail under Outgoing Mail Server:.
o You cannot send mail through MacFreePOPs. If you have no outgoing mail server through your ISP, you can use a Gmail or AIM Mail account's.
* Click Continue.
* Now click Create.
* Highlight the Yahoo! Mail account in the Accounts list.
* Go to the Advanced tab.
* Enter "2000" (not including the quotation marks) under Port:.
* Close the Accounts window.
* Click Save.

Access Free Yahoo! Mail with Mac OS X Mail Using IMAP Over IzyMail

To add a free Yahoo! Mail account in Mac OS X Mail using IzyMail, which provides access to all mail in all folders seamlessly:

* Make sure your Yahoo! Mail account is registered with IzyMail.
* Select Mail | Preferences... from the menu in Mac OS X Mail.
* Go to the Accounts category.
* Click + under the accounts list.
* Make sure IMAP is selected under Account Type:.
* Type "Yahoo! Mail (IzyMail)" under Account Description.
* Enter your name under Full Name:.
* Type your complete Yahoo! Mail address under Email Address:.
* Click Continue.
* Enter "in.izymail.com" (not including the quotation marks) under Incoming Mail Server:.
* Type your full Yahoo! Mail address under User Name:.
o If your Yahoo! Mail address is [email protected], do type "[email protected]" (omitting the quotation marks).
o Mac OS X Mail probably has already entered the user name for you. If you already find "qwertui" in the User Name: field, just append "@yahoo.com".
* Enter your Yahoo! Mail password under Password:.
* Click Continue.
* Type "out.izymail.com" (without the quotation marks) under Outgoing Mail Server:.
* Make sure Use Authentication is checked.
* Enter your full Yahoo! Mail address under User Name:.
* Type your Yahoo! Mail password under Password: again.
* Click Continue.
* Click Continue again.
* Now click Done.
* Cloe the Accounts window.
* Click Save.
* Open the _Draft folder under Yahoo! Mail (IzyMail) in the folder list.
* Select Mailbox | Use This Mailbox For | Drafts from the menu.
* Open the _Sent folder under Yahoo! Mail (IzyMail).
* Select Mailbox | Use This Mailbox For | Sent from the menu.
* Open the _Trash folder under Yahoo! Mail (IzyMail).
* Select Mailbox | Use This Mailbox For | Trash from the menu.
* Open the _Bulk folder under Yahoo! Mail (IzyMail).
* Select Mailbox | Use This Mailbox For | Junk from the menu.

Done!

Hi knittique Sorry to hear you are having problems,
Are you getting any error messages when you check mail ?
I would certainly call your eMail hosting company, don't wait for them to call you back...
Sometimes, a mailbox can get corrupted.
One test you can do is to use this service:
http://www.mail2web.com/
you can see if your mailbox is still active and working.