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[K12OSN] weird maillog



Running qmailrocks and all of a sudden there's this: "ERROR:
Connection dropped by IMAP  server" when logging in to the squirlmail
interface.  I looked in the maillog and saw a bunch of entries like
this:



mail vpopmail[10340]: vchkpw-pop3: vpopmail user not found pop3@:208.176.253.226
May 20 21:54:05 mail vpopmail[10341]: vchkpw-pop3: vpopmail user not
found squid@:208.176.253.226
May 20 21:54:05 mail vpopmail[10344]: vchkpw-pop3: vpopmail user not
found mysql@:208.176.253.226
May 20 21:54:05 mail vpopmail[10346]: vchkpw-pop3: vpopmail user not
found administrator@:208.176.253.226
May 20 21:54:06 mail vpopmail[10347]: vchkpw-pop3: vpopmail user not
found test@:208.176.253.226
May 20 21:54:07 mail vpopmail[10350]: vchkpw-pop3: vpopmail user not
found root@:208.176.253.226
May 20 21:54:07 mail vpopmail[10351]: vchkpw-pop3: vpopmail user not
found darwin@:208.176.253.226
May 20 21:54:07 mail vpopmail[10353]: vchkpw-pop3: vpopmail user not
found tester@:208.176.253.226
May 20 21:54:08 mail vpopmail[10355]: vchkpw-pop3: vpopmail user not
found upload@:208.176.253.226
May 20 21:54:08 mail vpopmail[10356]: vchkpw-pop3: vpopmail user not
found data@:208.176.253.226
May 20 21:54:08 mail vpopmail[10357]: vchkpw-pop3: vpopmail user not
found info@:208.176.253.226
May 20 21:54:08 mail vpopmail[10360]: vchkpw-pop3: vpopmail user not
found master@:208.176.253.226
May 20 21:54:09 mail vpopmail[10364]: vchkpw-pop3: vpopmail user not
found internet@:208.176.253.226
May 20 21:54:09 mail vpopmail[10365]: vchkpw-pop3: vpopmail user not
found admin@:208.176.253.226
May 20 21:54:10 mail vpopmail[10368]: vchkpw-pop3: vpopmail user not
found sales@:208.176.253.226
May 20 21:54:10 mail vpopmail[10370]: vchkpw-pop3: vpopmail user not
found rpm@:208.176.253.226
May 20 21:54:10 mail vpopmail[10371]: vchkpw-pop3: vpopmail user not
found pop3@:208.176.253.226


The mail server is not that ip address.  So is that address where the
activity is from or is somone using our server to check for those
names @:208.176.253.226?

Thanks,
Peter


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