Support > Frequently Asked Questions

MailShield’s FAQ
  1. Does MailShield introduce any limitation on receiving email size?

    MailShield does not automatically introduce any limitation of received email size, unless specifically configured in the Content Filtering engine.

  2. My outgoing server's IP address is necessarily different than my incoming mail server, as my domain's MX record refers to. Should this be a problem?

    The chances for being blocked by remote (receiving) email servers from this reason are very low, since the majority of the servers will do one of these tests: 1. Will try to resolve the domain of the sender (as appears in the ""From:"" field) to an IP address, by looking for the MX record. Since the domain is necessarily resolveable (The MX points to MailShield servers), the test will pass. 2. Will try to reverse-lookup the sending server's IP to a valid domain name. As long as the suctomer's sender address is resolveable (customer's responsibility), there will not be any problem. Comparing the sender's address (outgoing server) to the sender's domain MX record (incoming server) is rarely done. Doing so will affect many ISPs like Google, Netvision etc. and is not a uniqe problemaic issue for MailShield

  3. How long will items be kept in the quarantine?

    Virus Quarantined items: 14 days Spam / Content quarantine items: 30 days

  4. Let's say that a domain was accidentally deleted (manually) together with all configured users. Can this be restored?

    We make daily backups of complete configuration, when a domain/user is removed, all it's settings, stats and quarantined items are removed. Keeping copies of all this would have a large inpact on resources. When a user is removed or a domain is removed, it can easily be re-created using the web interface.

  5. Can the anti-virus and content filter handle archive files (zip, rar, tar, gz etc.). If yes - what are the exact file extensions that it can handle?

    Yes it can handle the common archive file types, like zip, rar, tar, bz

  6. If someone receives a virus-infected .exe within a .zip file - will it be blocked by the anti-spam?

    it will be blocked by the anti-virus filter, as it extracts these files to see what's in it

  7. If someone received a .exe file within a .rar file, and the content filter is configured to blocks .exe files - will it be blocked?

    No, the content filter does not extract

  8. How is the content filtering being made - is it based only on the file extension, or can it recognize renamed files as well?

    It looks at the content/type in the e-mail (header)

  9. Does the Anti-Virus test all attached files, or only those with known extensions? For example - will it filter an infected .exe file which was renamed

    It tests all files

  10. How often do the anti-virus / anti-spam / spamfilter engines are being updated for new signatures?

    Anti-virus commercial every 5 minutes, spamfilter is our own technology which is updated when it sees new technologies/signatures being used, on average once every 3-4 minutes

Other products’ FAQs

AlphaControl 10 questions
DataShield 10 questions
MailShield 10 questions