Sorry for the delay to answer. This is what I find in my logs:
Oct 5 16:27:40 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip> user=<me> Oct 5 16:28:17 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip> user=<me> The ip address is a temp address of my phone. I have plenty of them every day. But never during the night. Only during the day. Except today where I had plenty during the night where I wasn't using my phone. Here is the list. The first few ones are usual rejected connection attempts. BelowI have hidden the different IP addresses of my provider. This last night there were many connections attempt using my login name. Pam doesn't tell why exactly the connection was rejected. Fail2ban blocked connection attempts to dovecot from 192.168.2.6 (phone through wifi). Before oct. 5 16:27 it apparently worked without problem. I checked that there were no message pending to be sent. There are no log messages in syslog related to these rejected connection attempts. All these have been found in auth.log. Oct 4 08:15:54 home auth: pam_unix(dovecot:auth): check pass; user unknown Oct 4 08:15:54 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=business rhost=74.208.69.66 Oct 4 17:49:13 home auth: pam_unix(dovecot:auth): check pass; user unknown Oct 4 17:49:13 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=customerservice rhost=66.190.114.138 Oct 4 18:46:38 home auth: pam_unix(dovecot:auth): check pass; user unknown Oct 4 18:46:38 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=editor rhost=70.182.147.34 Oct 5 14:00:03 home auth: pam_unix(dovecot:auth): check pass; user unknown Oct 5 14:00:03 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=email rhost=74.94.179.226 Oct 5 16:27:40 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 16:28:17 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 17:10:02 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 17:10:37 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 17:14:36 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 17:37:56 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 17:38:43 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 18:02:00 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 18:02:44 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 19:43:23 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 19:44:00 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip1> user=<me> Oct 5 20:31:03 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 20:31:43 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 21:05:36 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 21:06:12 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 22:01:49 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 22:02:25 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 22:25:47 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 22:26:24 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 22:49:53 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 22:50:29 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 23:13:46 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 23:14:22 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 23:37:46 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 5 23:38:22 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip2> user=<me> Oct 6 08:56:46 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip3> user=<me> Oct 6 08:57:22 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip3> user=<me> Oct 6 09:20:47 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip3> user=<me> Oct 6 09:21:22 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip3> user=<me> Oct 6 10:26:38 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip4> user=<me> Oct 6 10:27:14 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip4> user=<me> Oct 6 10:56:53 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip4> user=<me> Oct 6 10:57:41 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip4> user=<me> Oct 6 12:59:03 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip5> user=<me> Oct 6 12:59:39 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip5> user=<me> Oct 6 13:06:34 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip5> user=<me> Oct 6 14:15:25 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip6> user=<me> Oct 6 14:16:01 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip6> user=<me> Oct 6 14:39:25 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip6> user=<me> Oct 6 14:40:00 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip6> user=<me> Oct 6 15:03:26 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip6> user=<me> Oct 6 15:04:02 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip6> user=<me> Oct 7 14:29:25 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip7> user=<me> Oct 7 15:19:46 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip7> user=<me> Oct 7 15:43:46 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip7> user=<me> Oct 7 16:07:46 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip7> user=<me> Oct 7 16:31:47 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip7> user=<me> Oct 8 08:47:57 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip8> user=<me> Oct 8 08:48:33 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip8> user=<me> Oct 8 08:49:08 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip8> user=<me> Oct 8 12:48:15 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 12:48:50 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 12:49:24 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 13:12:15 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 13:12:50 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 13:13:25 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 13:36:17 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 13:36:52 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 13:37:27 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 17:07:33 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip9> user=<me> Oct 8 17:08:09 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip9> user=<me> Oct 8 17:08:45 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip9> user=<me> Oct 8 18:22:36 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 18:23:10 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 18:23:44 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 18:46:36 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 18:47:12 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 18:47:47 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 19:10:38 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 19:11:13 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 19:11:48 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 19:34:38 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 19:35:13 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 19:35:48 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 22:30:16 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 22:30:50 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 22:31:25 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 22:54:17 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 22:54:52 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 22:55:27 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 23:19:23 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 23:19:57 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 23:20:32 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 23:43:24 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 23:44:00 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 8 23:44:35 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 00:07:23 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 00:07:57 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 00:08:32 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 01:07:05 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 01:31:06 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 02:05:45 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 02:29:46 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 02:53:45 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 04:19:53 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 04:43:52 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 05:07:53 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 05:08:27 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 05:09:02 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 05:31:53 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 05:55:53 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 06:39:01 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 07:23:56 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 07:47:56 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=192.168.2.6 user=<me> Oct 9 11:00:12 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip10> user=<me> Oct 9 11:00:47 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip10> user=<me> Oct 9 11:01:21 home auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=<me> rhost=<ip10> user=<me> -- -- You received this message because you are subscribed to the K-9 Mail Users List. 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