Hi, I have a bad nuisance problem with Thunderbird and one of my accounts at my ISP, the one I use for this list. I'm reading email, and suddenly the entire inbox becomes empty. After a while, when a new email arrives, I click on it and the inbox repopulates with the entire list. Knowing this, I send an email to myself from my phone. I have done this 64 times. When the inbox goes empty, it is also empty to tools like fetchmail. There are also milder occurrences of the problem, when the inbox "blinks" and Thunderbird looses track of where it was reading. I have contacted my ISP, and they blame Thunderbird. They said (translated (with google, then hand corrected)): +++...................... We have been reviewing the behavior of the account and after analyzing it we have reached the following conclusion: At times when there is a massive access to the account, the connections are not performing correctly, the state is inconsistent, producing errors in the indexes that in turn cause the mail to not display correctly. According to standard RFC-2177 mail clients must send the IDLE command to the server when they are ready to accept new mail. However we observe that when many connections are opened at the same time, this does not happen. We also notice that connections are opened with the account "robin.lists" and "robin.lists2" at the same time, when "robin.lists" is an alias of "robin.lists2" and therefore the content to display is the same . If possible, change the maximum number of connections to the server to 1 in the configuration of your client (Thunderbird). ......................++- I have done the suggested change in account settings / Server Settings / Advanced: "maximum number of server connections to cache" to 1 (it was 5). But the problem is still happening, several times today. It is a royal nuisance. This account is under the name "robin.listas2@...", and has an alias "robin.listas@...". All authentication must be done with the former, I have no idea why Thunderbird may use the second as they say. I have no logs from them, of course (I asked). About this alias thing I can do nothing, unless it is a bug in Th that can be reported... :-? -- Cheers / Saludos, Carlos E. R. (from 42.2 x86_64 "Malachite" at Telcontar)