ALL of the old command line anti-virus scanners are obsolete when it comes to SmarterMail. SmarterTools has removed all the command line scanner options from the knowledge base, and removed all previous forum information that would be helpful. They are working with Cyren... so you can either user Clam AV at 62% efficiency or Cyren Zero Hour or Cyren which costs a fortune and is no better than ClamAV.
I've tried to communicate this MAJOR ISSUE to SmarterTools, but all I get are vague and misleading answers.
Sad. I think we could use Avira and it's the best there is right now, but no way to pass the message to Avira unless SmarterTools helps us. So far they have refused.
ClamAV is nearly WORTHLESS and I suggest you notify ALL users that you no longer have an effective anti-virus solution and nobody is cooperating. Hope they use a good one. We see hundreds per day go straight thru ClamAV. It's essentially worthless since Cisco took them over. The pattern files haven't been changed in any significant way in about a year. I expect ClamAV to go away soon.
Your only options at this point are (as I see it):
1. Notify your customers that your anti-virus product is not effective for any newer virus, spyware, or trojans and they need to protect themselves.
2. Move them to Office 365 or the Google service that have modern virus scanning.
This is a MAJOR screw up by SmarterTools and all we get in reply is that "we're looking into it".
I've been in discussions with Avira and they want to help, but SmarterMail won't pass the message to their great command line scanner in any way we've found. Avira is the most effective of all virus scanners in the last 60 days and very, very low false positive rate. ClamAV is at only 62% at catching older infected files and even worse at newer ones (maybe 1 - 2 % at best).
Again SmarterTools won't listen, won't respond, and doesn't seem to give a damn. Sorry but that's the truth. They even eliminated all the old forum and knowledge base articles to use third party command line scanners. The function in SmarterMail to use a third party scanner is useless.
The 3rd option would be to use Declude, but they don't seem to have the program well documented or updated as far as I can tell. I'd love to use it, but it breaks DMARC, and DKIM the last time I used it.