Results 1 to 7 of 7
  1. #1
    Untanglit
    Join Date
    Oct 2007
    Posts
    27

    Default Block mails above certain size (ex. 9MB)

    Hello,
    We had a few issues with a client that wants to send mail of 11MB, 10MB...
    For there ADSL line this is a problem, the outlook client gets a timeout and tries again,
    result -> a whole night retrying sending the mail -> 5GB data traffic -> need to buy extra data blocks.
    Can I get a setup in the untangle so an untangle filter blocks every SMTP or POP3 message that is over a certain size?
    /EDIT: The untangle box is a bridge between ADSL modem and the switches, protecting about 15 users, the open source version is installed
    thanks!

  2. #2
    mdh
    mdh is offline
    Untangle Ninja mdh's Avatar
    Join Date
    Aug 2007
    Posts
    4,752

    Default

    I don't see that one happening. That issue is between you and your email server administrator, or training that client.

  3. #3
    Untanglit
    Join Date
    Oct 2007
    Posts
    27

    Default

    Quote Originally Posted by mdh View Post
    I don't see that one happening. That issue is between you and your email server administrator, or training that client.
    Ok I understand, but receiving big mails is not a problem, it's sending big mails over the ADSL line.

    So can I set an SMTP filter that looks at the messages that are being sent from the internel network (all outlook 2003 / 2007 clients with pop3 / smtp connection)?

  4. #4
    Untanglit
    Join Date
    Oct 2007
    Posts
    27

    Default

    In the SMTP filter I see in the event log: "Oversize message"

    What does dis mean? Oversized for Untangle or for the SMTP server of the ISP?

    Can this setting be altered?

  5. #5
    mdh
    mdh is offline
    Untangle Ninja mdh's Avatar
    Join Date
    Aug 2007
    Posts
    4,752

    Default

    I think both of your last two questions need to be answered by someone with an Engineering perspective.

    From MY perspective, big emails do present a problem, BUT that is also from a corporate standpoint and not from the individual user perspective. You may want to receive that 9MB file. Someone at a company gets it in their inbox, but ends reading it via a pay-per-minute or pay-per-megabyte kiosk connection or through a Blackberry on the road somewhere. Its often more trouble than its worth in a business setting.

  6. #6
    mdh
    mdh is offline
    Untangle Ninja mdh's Avatar
    Join Date
    Aug 2007
    Posts
    4,752

    Default

    The "engineering perspective" came up with the "oversize message" answer. Untangle's Spam Blocker ignores messages larger than 150KB, with the rationale being that a successful spammer sends out as many short messages as possible. Sending big spams is counter-productive for them. We do check those same files for viruses, but even then, viruses or exploits are usually short and (anything but) sweet. Thanks for asking a question that got me a new answer!!!

  7. #7
    Untangler
    Join Date
    Apr 2008
    Location
    Bama
    Posts
    63

    Default Yes you can do this

    Again, as you were told before, it depends on what kind of e-mail server you are using. You will have to configure this at the level of the e-mail server, whether or not you can get it to act the way you want it to is not an untangle question, it's an e-mail server question.

    Exchange can filter outgoing e-mails based on size, determine if they are leaving the corporation, etc. and apply rules that way. I believe linux based e-mail servers such as postfix can do the same thing, but alas, I'm not sure.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

SEO by vBSEO 3.6.0 PL2