I hope this is your test server and not your production server as I see some dangerous instructions as well:
As I see in your log files you did update your system (due to the necessary events at Dec 16 around 16:25):
Dec 16 16:26:01 mail esmith::event[2614]: Processing event: bootstrap-console-save
Dec 16 16:26:01 mail esmith::event[2614]: Running event handler: /etc/e-smith/events/bootstrap-console-save/S00initialize-default-databases
Dec 16 16:26:01 mail esmith::event[2614]: Migrating existing database networks
Dec 16 16:26:01 mail esmith::event[2614]: Migrating existing database domains
Dec 16 16:26:01 mail esmith::event[2614]: Migrating existing database yum_repositories
Dec 16 16:26:01 mail esmith::event[2614]: Migrating existing database mailpatterns
Dec 16 16:26:01 mail esmith::event[2614]: Migrating existing database yum_installed
Dec 16 16:26:01 mail esmith::event[2614]: Migrating existing database spamassassin
Dec 16 16:26:01 mail esmith::event[2614]: Migrating existing database configuration
Dec 16 16:26:03 mail esmith::event[2614]: Migrating existing database hosts
Dec 16 16:26:03 mail esmith::event[2614]: Migrating existing database yum_updates
Dec 16 16:26:03 mail esmith::event[2614]: Migrating existing database yum_available
Dec 16 16:26:03 mail esmith::event[2614]: Migrating existing database accounts
Dec 16 16:26:03 mail esmith::event[2614]: Migrating existing database backups
Dec 16 16:26:03 mail esmith::event[2614]: S00initialize-default-databases=action|Event|bootstrap-console-save|Action|S00initialize-default-databases|Start|1197815161 73900|End|1197815163 473780|Elapsed|2.39988
Dec 16 16:26:03 mail esmith::event[2614]: Running event handler: /etc/e-smith/events/bootstrap-console-save/S03conf-hostsdb
Dec 16 16:26:03 mail esmith::event[2614]: S03conf-hostsdb=action|Event|bootstrap-console-save|Action|S03conf-hostsdb|Start|1197815163 474053|End|1197815163 620552|Elapsed|0.146499
Dec 16 16:26:03 mail esmith::event[2614]: Running event handler: /etc/e-smith/events/bootstrap-console-save/S04purge-domain
Dec 16 16:26:03 mail esmith::event[2614]: S04purge-domain=action|Event|bootstrap-console-save|Action|S04purge-domain|Start|1197815163 620899|End|1197815163 750756|Elapsed|0.129857
Dec 16 16:26:03 mail esmith::event[2614]: Running event handler: /etc/e-smith/events/actions/generic_template_expand
... and see you disable the sme8os repository a few days later (Dec 19 around 09:26):
Dec 19 09:36:12 mail /etc/e-smith/web/panels/manager/cgi-bin/yum[4972]: /home/e-smith/db/yum_repositories: OLD sme8os=repository|BaseURL|http://mirror.contribs.org/smeserver/releases/testing/8/smeos/i386/|EnableGroups|yes|GPGCheck|no|Name|SME Server 8 - smeos|Visible|yes|status|enabled
Dec 19 09:36:12 mail /etc/e-smith/web/panels/manager/cgi-bin/yum[4972]: /home/e-smith/db/yum_repositories: NEW sme8os=repository|BaseURL|http://mirror.contribs.org/smeserver/releases/testing/8/smeos/i386/|EnableGroups|yes|GPGCheck|no|Name|SME Server 8 - smeos|Visible|yes|status|disabled
Dec 19 09:36:12 mail /etc/e-smith/web/panels/manager/cgi-bin/yum[4972]: /home/e-smith/db/yum_repositories: OLD smeupdates-testing=repository|BaseURL|http://mirror.contribs.org/pub/smeserver/releases/7/smeupdates-testing/$basearch|EnableGroups|yes|GPGCheck|yes|MirrorList|file:///etc/yum.repos.d/mirrors-smeupdates-testing|Name|SME Server - updates testing|Visible|yes|status|enabled
Dec 19 09:36:12 mail /etc/e-smith/web/panels/manager/cgi-bin/yum[4972]: /home/e-smith/db/yum_repositories: NEW smeupdates-testing=repository|BaseURL|http://mirror.contribs.org/pub/smeserver/releases/7/smeupdates-testing/$basearch|EnableGroups|yes|GPGCheck|yes|MirrorList|file:///etc/yum.repos.d/mirrors-smeupdates-testing|Name|SME Server - updates testing|Visible|yes|status|disabled
Dec 19 09:37:13 mail /etc/e-smith/web/panels/manager/cgi-bin/groups[5044]: /home/e-smith/db/accounts: OLD tot=group|Description|tot|Gid|5014|Members|admin|Uid|5014
Dec 19 09:37:13 mail /etc/e-smith/web/panels/manager/cgi-bin/groups[5044]: /home/e-smith/db/accounts: NEW tot=group-deleted|Description|tot|Gid|5014|Members|admin|Uid|5014
I suspect that you updated from the sme8os repository. Can you confirm that? Can you post the /var/log/yum.log from that update so we can see if you did leave the sme8os repository enabled and perhaps drag in any RPMS from there unintended?