@burnout426 I know they weren't stored anywhere because, as I said in my first e-mail: I ran FileMon while requesting mail. The bad account makes the initial reads of omailbase.dat (which keeps track of all the messages in the store folder for all accounts) and nothing more. A good account makes these initial reads of omailbase.dat, then writes it and reads again, and then reads the uidl file for the account (which identifies which e-mails have been read previously for that account), and then continues with reads and writes of the uidl files and other files.

@burnout426 Thanks for the idea. Yahoo mail does not recognize my e-mail address, which is my username.

@burnout426 I never used M2. I sent feedback to AOL about the problem. The first response was very promising, asking for some more information. The next response was more of a boilerplate response on what to try, more for people who never set the account up properly. It seems the answer is for them to have all their servers handle UIDL.

@burnout426 I had just read that M2 is what Opera Mail was previous known as. Before I ever tried Opera Mail, when I used Opera browser and its built in mail client I had read about M2.
Anyway I have one e-mail account that is not at AOL. I just checked that and it responds with UIDL in its capability list. I couldn't say if it would have had problems before if there were no UIDL, but it seems that it would.

I finally got a log from thunderbird. It sends UIDL even though it is not in capability list, and request works.

@burnout426 Interesting idea. I found 2 POP proxies but it doesn't look like I can get the proxies to look at messages and add a response, and neither seemed to handle an encrypted interface. I didn't do an extensive search.

So yesterday at 4:29 PM another account at AOL dropped UIDL. It was OK at 4:24 PM. (they are read automatically every 5 minutes). At around the same time, accessing that account with the Courier e-mail program (also POP3), it started reacting differently and it read all the e-mails that were at the server. Now sometimes it reads all and sometimes only what is new, but when it reads what is new it says it is going to read all of them and then reports an error after receiving the new ones.

So, I guess there are 3 ways to respond to no UIDL in the CAPA list. One is to QUIT, as Opera does. Another is to retrieve all messages, since it cannot find out which ones it has already, as Courier does. And then it can just issue UIDL anyway, as Thunderbird, Outlook Express, and others do.

@burnout426 Thanks for all these suggestions and information. Sounds interesting to try, when I get time which is hopefully soon. The six accounts is down to one that works. Luckily, it's the one with the most mail, but I figure they'll change that one too soon. At least Thunderbird and Outlook Express work.

Well, AOL finally got around to changing the server for my final account. Now I can receive no e-mail with Opera.

AOL is acting up again, this time with Thunderbird, as well as Opera. Many days it does not accept my password for one or two accounts, but other days it does. I tried it with Opera just to see if it is Thunderbird or Sea Monkey, but it happened with Opera too. I checked the log of Opera and it rejected the password. I can log into the e-mail account online, so it has the correct password. For a week this was happening with just one account, then yesterday it happened with another account.

@sbruce45 No changes and now it works OK.

@burnout426 AOL has just gotten much worse. I think they are trying to force people to IMAP. With SeaMonkey I just got this error on one of the mail accounts which worked 4 hours ago:

The POP3 mail server (pop.verizon.net) does not support UIDL or XTND XLST, which are required to implement the Leave on Server'', Maximum Message Size'' or ``Fetch Headers Only'' options. To download your mail, turn off these options in the Server Settings for your mail server in the Account Settings window.

Well, AOL finally got around to changing the server for my final account. Now I can receive no e-mail with Opera.

@burnout426 I tried replacing pop.verizon.net as my server with jpop700-aol-sec.mail.vip.ir2.yahoo.com and it does not authenticate. So I created a new account and it won't authenticate either.

@burnout426 Well I finally got a response from an AOL Email Support Specialist with the dreaded reply: "that this might happen if the application that you are using is not supported anymore." Such nonsense. The POP3 protocol has not changed.

@burnout426 Thanks for all these suggestions and information. Sounds interesting to try, when I get time which is hopefully soon. The six accounts is down to one that works. Luckily, it's the one with the most mail, but I figure they'll change that one too soon. At least Thunderbird and Outlook Express work.

So, I guess there are 3 ways to respond to no UIDL in the CAPA list. One is to QUIT, as Opera does. Another is to retrieve all messages, since it cannot find out which ones it has already, as Courier does. And then it can just issue UIDL anyway, as Thunderbird, Outlook Express, and others do.

So yesterday at 4:29 PM another account at AOL dropped UIDL. It was OK at 4:24 PM. (they are read automatically every 5 minutes). At around the same time, accessing that account with the Courier e-mail program (also POP3), it started reacting differently and it read all the e-mails that were at the server. Now sometimes it reads all and sometimes only what is new, but when it reads what is new it says it is going to read all of them and then reports an error after receiving the new ones.

@burnout426 Interesting idea. I found 2 POP proxies but it doesn't look like I can get the proxies to look at messages and add a response, and neither seemed to handle an encrypted interface. I didn't do an extensive search.