Has the max connections been changed (reduced) recently? Is it low enough that a small number of devices behind a NAT-ed could trigger the limit? If this is the problem, is there anything I can do other than make sure a limited number of devices are monitoring email at one time?3 NO Maximum number of connections from user+IP exceeded (mail_max_userip_connections)
1. This only happens on my home connection, never when using mobile devices away from home.
2. My home connection presents a single IP to the world and I have a router between my network and the WAN connection that manages internet access for a modest number of devices.
3. "Modest" with regard to email clients that access Roller Network servers is usually around 3 devices: A few Linux machines (desktop + laptop) running Thunderbird and a few Android devices running K-9 mail. Each are configured to check mail for my personal account and the 'Any User' or catchall account. So at most 3 or 4 devices could be connecting to the same accounts simultaneously.
4. I most often experience login failures with Thunderbird, though I have seen the android clients fail a few times. I suspect the latter just fail silently most of the time and T-bird is just less tolerant to the login failures. T-Bird typically throws up a password dialog. Entering the correct pw results in continued failure and another round of dialogs until T-bird eventually gives up.
5. It's usually just once device at a time that fails (typically Thunderbird when I first start it). I can still successfully check mail from the other clients from the same network and IP. I can also login to Webmail from a browser, so I know the email account itself is active and working.
6. If I turn off WiFi on my mobile devices (so they aren't on my network) and wait awhile, Thunderbird usually connects successfully.
Anyone else seeing this kind of thing?