Results 1 to 5 of 5

Thread: Some emailers are being rejected

  1. #1
    tobuck is offline Active Member
    Join Date
    Apr 2006
    Posts
    25
    Rep Power
    9

    Default Some emailers are being rejected

    Need some help on this...

    On the admin page, global settings, MTA tab, I originally checked all the following:

    Protocol Checks:
    Hostname in greeting violates RFC
    Client must greet with a ...
    Sender address must ...

    DNS checks:
    Client's IP Address...
    Hostname in greeting...
    Sender's domain...

    One of my users is getting some of his emails bounced by Zimbra. These messages are not spam but I think they have to do with the security settings that I have chosen.

    The message that the originator gets back is:

    The e-mail system was unable to deliver the message, but did not
    report a specific reason. Check the address and try again. If it still
    fails, contact your system administrator.
    : Helo
    command rejected: Host not found>

    Am I correct in assuming the originator's system is very lax in security and they are not following industry standards? Is this just a situation where they have a lazy sys admin who doesn't really know what he/she is doing?

    What setting, in the Zimbra admin/global settings/MTA page do I have to undo so that this email can get through? I don't want to undo everything.

    Since using Zimbra and all the special checks from the MTA tab the amount of SPAM has been almost reduced to 0.

    Thanks in advance.

  2. #2
    KevinH's Avatar
    KevinH is offline Expert Member
    Join Date
    Aug 2005
    Location
    San Mateo, CA
    Posts
    4,789
    Rep Power
    19

    Default

    I'd guess either of these two:

    Hostname in greeting violates RFC
    Client must greet with a ...
    Looking for new beta users -> Co-Founder of Acompli. Previously worked at Zimbra (and Yahoo! & VMware) since 2005.

  3. #3
    tobuck is offline Active Member
    Join Date
    Apr 2006
    Posts
    25
    Rep Power
    9

    Default

    Once selecting or deselecting any of these options and then saving do they take effect immediately or do I have to restart zimbra?

  4. #4
    KevinH's Avatar
    KevinH is offline Expert Member
    Join Date
    Aug 2005
    Location
    San Mateo, CA
    Posts
    4,789
    Rep Power
    19

    Default

    You'll need to restart the MTA. We generate the config file at startup so a restart is needed.
    Looking for new beta users -> Co-Founder of Acompli. Previously worked at Zimbra (and Yahoo! & VMware) since 2005.

  5. #5
    mikechansf is offline Member
    Join Date
    Aug 2006
    Posts
    10
    Rep Power
    8

    Default

    Quote Originally Posted by KevinH
    I'd guess either of these two:

    Hostname in greeting violates RFC
    Client must greet with a ...
    What is the default for the Zimbra system for both Protocol and DNS checks? I am running Zimbra 4.0 on CentOS 4.3. Thanks.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. mail rejected
    By dmore73 in forum Administrators
    Replies: 2
    Last Post: 06-01-2007, 01:13 AM
  2. Recipient address rejected
    By stillSpirit in forum Installation
    Replies: 13
    Last Post: 08-10-2006, 06:22 PM
  3. Recipient Address Rejected from email client
    By gunkmail in forum Administrators
    Replies: 2
    Last Post: 05-14-2006, 09:42 PM
  4. Sender Address Rejected
    By DMRDave in forum Administrators
    Replies: 3
    Last Post: 03-10-2006, 12:41 PM
  5. remote POP3 clients rejected
    By kennyfordham in forum Administrators
    Replies: 10
    Last Post: 10-10-2005, 01:14 PM

Posting Permissions

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