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Helo command rejected: Host not found

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Helo command rejected: Host not found - 6.Mar.2007 9:51:13 PM

haragan

Posts: 35
Joined: 10.Oct.2006
Status: offline

This is the first time I hear of this issue. Some one in our company gets the following error when sending mail out. We have two backend servers and two front end servers in our environment. I downloaded Metabase Explorer and verified that the Fully qualified domain name is "servername.company.com instead of "mail.company.com" Can I just change the value in systemroot%\system32\inetsrv\metabase.xml to use the FQDN?

554 <servername.company.com>: Helo command rejected: Host not
found; from=<tom.@company.com>

Post #: 1

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RE: Helo command rejected: Host not found - 7.Mar.2007 7:08:57 AM

e_aravind

Posts: 118
Joined: 6.Mar.2005
From: India
Status: offline

first identify the pattern of the errors.
* To which domain, these messages are generated?

(in reply to haragan)

Post #: 2

RE: Helo command rejected: Host not found - 7.Mar.2007 9:12:50 AM

haragan

Posts: 35
Joined: 10.Oct.2006
Status: offline

Thank you for replying. The entire error our user gets when sending email to someone@activevoice.com is
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
<servername.company.com #5.5.0 smtp;554 <servername.company.com>: Helo command rejected: Host not found>

Our exchange server is using its netbios name instead of mail.company.com.

(in reply to e_aravind)

Post #: 3

RE: Helo command rejected: Host not found - 7.Mar.2007 9:34:53 AM

jchong

Posts: 2516
Joined: 1.Dec.2005
From: Centreville, Virginia
Status: offline

You do not need to edit the metabase, you can verify this from your smtp virtual server. Unless your ds2mb replication is broke then you will need to edit in your metabase.

Resolution:

1. Open Exchagne System Manager. Navigate to Administrative Groups, Site, Servers, Servername, Protocols, SMTP, Default SMTP Virtual Server,

2. Highlight Default SMTP Virtual Server, right click properties.

3. Go to the Delivery Tab, and click Advanced Button.

4. In the "Fully-qualified domain name: field, enter your fully qualified external domain name. Click Check DNS to verify that it resolves.

5. Restart SMTP service.

James Chong (MVP)
MCSE | M+, S+, MCTS, Security+
msexchangetips.blogspot.com

(in reply to haragan)

Post #: 4