How do I change how often yahoo checks for mail?

How do I change the "From" address in Thunderbird with Yahoo mail?

• I have a non-Yahoo e-mail address that forwards all e-mail it receives to my Yahoo (Mail Plus) account. I use Thunderbird to send & receive e-mail from the Yahoo account. I used to be able to have the "From" address when I composed e-mail be the non-Yahoo address, so that whoever got my e-mail had no idea I had a Yahoo account without looking closely at the mail headers. Now, when I try to do this, I get an error about the alternate address not being verified, even though it is. Has something changed with Yahoo mail? Is there a way to fix this?

• Answer:

  Thousands are having many different problems with their e-mail. This applies to almost all areas of mail (including signing in, composing, receiving, sending, attachments, photos, etc.), original and beta mail, messenger and search problems, for the last few weeks. Yahoo! is wrapping up a few remaining compatibility issues between Yahoo! Mail Beta (beta testing lasts for at least 6 months!!!) and the new Microsoft Internet Explorer 7 1. You will have less problems with original mail if you sign in via Messenger! Go to preferences, general, then check box: Automatically sign me in when I click a Yahoo! link in Messenger. 2. Or if you don't have Yahoo Messenger: Beta wouldn't let me in so I went to beta help and it said to click on my toolbar mail icon. So I did and it worked! 3. Or if you don't have beta mail: http://wap.oa.yahoo.com/ can be used to sign into Yahoo!, then put yahoo back into the address bar and hit go. It will take you back to Yahoo! and you can open mail normally. Otherwise, you can open mail in wap, but it is blind. I had to go through wap each time I logged in. 4. BETA means TESTING!!! So, it seems we have to stop using these two programs (if you installed them) or try to work around them until they finish wrapping things up. Your IE6 is still installed, so you just have to go to: Start, settings/control panel, add/remove programs and delete IE7. For Beta mail you only have to use the switch back option located in your mail inbox.Also, where you sign in by clicking on: Are you having trouble?. You can keep trying them periodically! This link has a lot of good info that covers about everything on a PC: http://www.freecreed.com/home.htmlysreq=... Yahoo! Mail Help Tips: http://help.yahoo.com/help/uk/mail/ext/e... I hope this helps you.