I have looked through the Sophos configuration options and below is a list of commands that you can preform to get proper e-mail alerts:
/opt/sophos-av/bin/savconfig SendErrorEmail true
/opt/sophos-av/bin/savconfig SentThreatEmail true
/opt/sophos-av/bin/savconfig EmailNotifier true
/opt/sophos-av/bin/savconfig EmailDemandSummaryIfThreat true
/opt/sophos-av/bin/savconfig Email your@emailaddress.com
To remove an email address from the list:
/opt/sophos-av/bin/savconfig delete Email yoursecond@emailaddress.com
You can repeat the Email command above with a single email address and until you delete that new email using the delete command it will remain, so you can add multiple addresses at different times (the first time, add your address, then later add another technical addy.)
To disable the on-access scanning in Sophos for now with this command:
/opt/sophos-av/bin/savdctl disable
It can later be re-enabled with this command:
/opt/sophos-av/bin/savdctl enable
As for checking for what Sophos has been doing lately, the log files are located in the following path:
/opt/sophos-av/log
As for further documentation, there are man pages for most of the various Sophos binaries that you can find in /opt/sophos-av/bin so you should be able to view the man page for them with "man savdctl" or whichever binary you need to look at.
Add the following line to the bottom of /etc/postfix/main.cf or extend the existing smtpd_client_restrictions line:
smtpd_client_restrictions = reject_rbl_client sbl.spamhaus.org, reject_rbl_client bl.spamcop.net