The message log is filled with the following type of lines.
Aug 16 19:07:54 COS clamd[3614]: Reading databases from /var/lib/clamav
Aug 16 19:08:11 COS clamd[3614]: Database correctly reloaded (1599495 signatures)
Aug 16 19:08:14 COS mailfilter[6371]: [horde] Invalid response code received from server <ID: <@mx3.northumberlandleadership.com>> [pid 6371 on line 184 of "/usr/webconfig/pear$
Aug 16 19:08:14 COS mailfilter[6369]: [horde] Invalid response code received from server <ID: <@mx3.northumberlandleadership.com>> [pid 6369 on line 184 of "/usr/webconfig/pear$
Aug 16 19:08:14 COS mailfilter[6375]: [horde] Invalid response code received from server <ID: <@mx3.northumberlandleadership.com>> [pid 6375 on line 184 of "/usr/webconfig/pear$
Aug 16 19:08:46 COS saslauthd[32011]: Retrying authentication
Aug 16 19:10:02 COS saslauthd[32012]: Retrying authentication
Aug 16 19:11:06 COS saslauthd[32013]: Retrying authentication
Aug 16 19:11:23 COS mailfilter[6617]: [horde] Invalid response code received from server <ID: <
40283468696951344624378934aa23626a662a7fb7f1a4e91f@mail1.sangohaiphong.com>> [pid$
Aug 16 19:11:23 COS mailfilter[6622]: [horde] Invalid response code received from server <ID: <
40283468696951344624378934aa23626a662a7fb7f1a4e91f@mail1.sangohaiphong.com>> [pid$
Aug 16 19:11:23 COS mailfilter[6627]: [horde] Invalid response code received from server <ID: <
40283468696951344624378934aa23626a662a7fb7f1a4e91f@mail1.sangohaiphong.com>> [pid$
Aug 16 19:15:20 COS mailfilter[6891]: [horde] Invalid response code received from server <ID: <
525007863107244842935489a45bb34737c3664f16677141017@mx.credencepublishing.com>> [$
Aug 16 19:15:20 COS mailfilter[6894]: [horde] Invalid response code received from server <ID: <
525007863107244842935489a45bb34737c3664f16677141017@mx.credencepublishing.com>> [$
Aug 16 19:15:21 COS mailfilter[6900]: [horde] Invalid response code received from server <ID: <
525007863107244842935489a45bb34737c3664f16677141017@mx.credencepublishing.com>> [$
Aug 16 19:18:06 COS saslauthd[32011]: Retrying authentication
Aug 16 19:18:11 COS clamd[3614]: SelfCheck: Database status OK.