Thunderbird has no servers. It is software running on your computer.

many thanks...any suggestions to solve this? as mentioned, att yahoo mail is fine. i use tbird as my main email software, as i use to with older netscape. this "cant send messages" is a new problem, over the past 3-4 days. help?

Use someone other than Yahoo. I am not sure what it is going to take to finally convince Yahoo customers that they are barely an email provider. Now they are doing everything they can to force their users to use their webmail so you have to watch their ads.

If I understand your problem completely, I think I have the same issue that just began <24 hours ago. I called ATT(ISP) to find out what is going on. After several minutes of conversation, and fully explaining I was a POP3 user, with Tbird, I was told - "ATT DOES NOT SUPPORT TBIRD". They also gave me a phone # of some organization named "ConnecTech", that charges hourly to diagnose this problem that didn't occur 25 hours ago. I was also given all the POP3 settings, but I knew those to be correct because I've been using Tbird for many years on ATT. (But, we have had some port changes over the years when implementing SSL. That's how far I go back). Anyway, I yanked Tbird and Firefox off the system, and rebuilt the whole thing. I'm still getting the "An error occurred while sending mail. The mail server responded:Resources temporarily unavailable. Please try again later. Please check the message and try again". Although I have received a similar message containing a Yahoo URL. These messages sound to me like ATT's POP mail server is choking. I was also asked to navigate to ATT's LDAP site, and prove that I could send/receive completely. Like that event would have any real bearing at all.

AT&T does not need to support Thunderbird to fix their server that is issuing the errors. Them claiming that since you can use their webmail so they are working is total BS. Webmail does not use POP, IMAP or SMTP servers that are giving the errors.

At least you have company. http://downdetector.com/status/yahoo-mail

thanks for coments airmail & gmak...so do you feel it is an att server problem, and that (hopefully soon) they will fix? since taking off ffox & tbird, then reinstall did not work, are we waiting for att fix (lke the downdetector folks are as well). please share ideas, or perhaps howwho/# to speak with att side, folks that moght be truly helpful. much appreciated.

I have no suggestions other that find a provider that has not outsourced their email to Yahoo.

shele said

thanks for coments airmail & gmak...so do you feel it is an att server problem, and that (hopefully soon) they will fix? since taking off ffox & tbird, then reinstall did not work, are we waiting for att fix (lke the downdetector folks are as well). please share ideas, or perhaps howwho/# to speak with att side, folks that moght be truly helpful. much appreciated.

Yes, it's probably an ATT's email server restriction problem. If you viewed Airmail's "us too" URL, you can see the magnitude of the problem already. Of course, for ATT to correct, means they need to acknowledge the problem. After they get a couple of million reports from angry users, they'll probably begin to take a look, and quit dodging the issue as they did with me. Hopefully.

You know, the thing that confused me the most was being told by the ATT CSR that Tbird was not supported. She didn't just pull that off the top of her head, she had some kind of script that stated that, apparently. She quoted the email products that were supported, and they were all MS products - Outlook, Mail Live, Live Mail, whatever they are. I remember thinking that if you support POP clients, you've got to support Tbird. The whole thing just didn't make any sense. Maybe they just want all webmail users?

They also give out a name and phone number for a company that has nothing to do with Thunderbird and charge you for help.

Read the comments on this site. People are complaining about problems with phones and iPads. Thunderbird does not run on those devices. I wonder what AT&T/Yahoo blame that on? http://downdetector.com/status/yahoo-mail/news/150390-problems-at-yahoo-mail-2

Yes, you are right. I didn't really think of that because I was too focused on my own grief. But I did read, and scan, many of those reports. Now that you describe, it seems like most of the reports were cell phones, iPads, and just about any other device type that's highly portable. I also seem to recall several reports that spanned several more days than I experienced, or the OP described here. They also could have been weeks. I guess we're lucky.

I just tried sending a loopback email from four accounts. All four mails completed without any interruption. No guarantees, but I'd say that at this moment, it's been corrected. As least it works here, at this very moment.