The Community Forums

Interact with an entire community of cPanel & WHM users!
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Possible domain corruption

Discussion in 'E-mail Discussions' started by Barney Buoy, Sep 10, 2011.

  1. Barney Buoy

    Barney Buoy Registered

    Joined:
    Sep 9, 2011
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    1
    cPanel Access Level:
    Root Administrator
    Hey Guys,

    Hope someone can assist.

    Wondering if anyone has ever encountered an issue where a CPanel account prevents .xlsx or .docx attachments getting through.

    We have a dedicate server with 10 domains on it. One of the domains has this issue. No email account can receive email with attachments that are .xlsx or .docx - any email never arrives. If the x is removed from the attachment name, .xls or doc, the email and attachments get though. All filtering has been turned off as has SPAM Assassin. We have eliminated the ISP, any hardware/software in the building, the location, and other email accounts for domains running on the server that we've set up in the building to test if they also display the same behaviour - they didn't - it seems to be specific to that particular domain.

    There are only 2 possible explanations we can think of:

    1. Their domain account is somehow corrupt on the server
    2. There is something else interfering with the flow of emails, possibly some filtering from their old hosting company, renown for causing problems once hosting has been moved elsewhere because of their general incompetency.

    We've decided to set the domain up on a brand new server as we've run out of solutions. If anyone has any ideas, they would be greatly appreciated.

    Thanks in advance,

    Barney Buoy
    POINT 2 POINT
     
  2. gvard

    gvard Well-Known Member
    PartnerNOC

    Joined:
    Dec 22, 2003
    Messages:
    195
    Likes Received:
    1
    Trophy Points:
    18
    Location:
    Athens/GREECE
    cPanel Access Level:
    DataCenter Provider
    Hi,

    Try: WHM -> Exim Configuration Editor -> Attachments: Filter messages with dangerous attachments set to OFF.
     
  3. Barney Buoy

    Barney Buoy Registered

    Joined:
    Sep 9, 2011
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    1
    cPanel Access Level:
    Root Administrator
    Thanks for the tip George, but we've already tried that, didn't work....
     
  4. cPanelTristan

    cPanelTristan Quality Assurance Analyst
    Staff Member

    Joined:
    Oct 2, 2010
    Messages:
    7,623
    Likes Received:
    21
    Trophy Points:
    38
    Location:
    somewhere over the rainbow
    cPanel Access Level:
    Root Administrator
    Hello Barney,

    Please try checking the email in the logs to see what it shows happening:

    Code:
    exigrep emailsender@domain.com /var/log/exim_mainlog
    For emailsender@domain.com, please replace with the email address of the sending user. It must be a filter causing the issue, that's really the only explanation. It is probably either cPanel > Account Level Filtering or cPanel > User Level Filtering.
     
  5. Barney Buoy

    Barney Buoy Registered

    Joined:
    Sep 9, 2011
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    1
    cPanel Access Level:
    Root Administrator
    Hey Tristan,

    Thanks. We got our guys to check this but they could find nothing that helped.

    We now think there is a Host File somewhere at the old hosting co. They used to use them years ago and this domain had been with them for 10 years.

    It seems unlikely that of the 13 domains that are on the server, only 1 has this issue. It is a dedicated server, 6 months old if that.

    If the same attachments are sent from an email address to another email address on a domain also hosted on this server, they all get through, regardless of whether they are .xls/.doc or .xlsx/.docx. That would indicate it's the domain that has the issue, but how likely is this to happen?

    All we can really do is move the domain to another server and see what happens - if the issue continues, it has to be the old hosting co.

    If anyone has any other ideas, please post.
     
  6. Infopro

    Infopro cPanel Sr. Product Evangelist
    Staff Member

    Joined:
    May 20, 2003
    Messages:
    14,451
    Likes Received:
    195
    Trophy Points:
    63
    Location:
    Pennsylvania
    cPanel Access Level:
    Root Administrator
    Twitter:
    So there are no customizations located where cPanelTristan mentioned? And, there is nothing at all in log when an email is sent, and the log checked right afterward?

    This is probably not helpful at all, but can you setup an account on this particular domain for you and test this? I'm wondering if its an end user issue.
     
  7. cPanelTristan

    cPanelTristan Quality Assurance Analyst
    Staff Member

    Joined:
    Oct 2, 2010
    Messages:
    7,623
    Likes Received:
    21
    Trophy Points:
    38
    Location:
    somewhere over the rainbow
    cPanel Access Level:
    Root Administrator
    The same filters do not get processed for domains on the server locally versus domains sending remotely to the server, so the attachments working via domains on the server don't necessarily mean there isn't a filter. There obviously is some type of filter impacting the email. That filtering should be showing up in the exigrep I'd mentioned to try.

    Now, when you were testing, were you using webmail such as Roundcube or Horde, or were you using an off server email client like Thunderbird or Outlook?
     
Loading...

Share This Page