Cannot Find Your Hostname Error
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2013SBS2008/2011Server 2003Server 2008Server 2012Windows VistaWindows 7Windows 8Windows 10Windows XPTerminal ServicesVMwareVeeam HomeMicrosoft Exchange 2003 #450 4.7.1 Client Host Rejected Cannot Find Your Hostname ## #450 4.7.1 Client Host Rejected Cannot Find Your Hostname ## Written by Allen White on. Posted in Exchange 2003, Exchange 2007, Exchange 2010, Exchange client host rejected cannot find your hostname postfix 2013, Microsoft Office This error message is seen when you have sent
450 4.7.1 Client Host Rejected Cannot Find Your Reverse Hostname
an email and the remote server rejects the email. In your exchange 2010 or Exchange 2007 queue manger you
Client Host Rejected Cannot Find Your Hostname (in Reply To Rcpt To Command)
will see this error. You may notice this error when users cannot send mail only to certain domains but it is fine with others. This normally means that the address
Client Host Rejected: Cannot Find Your Hostname Zimbra
you are trying to send email to, the server is using reverse look ups. This means you send an email from youraddress@yourdomain.com this leaves your system stamped with your IP address. Then when the remote system receives your email it does a check to see if “yourdomain.com” is actually the sender by making sure that the IP the mail came from points 554 5.7.1 client host rejected: cannot find your hostname to “yourdomain.com”. This is done by querying the PTR record. So, if you see this error there are two things to check. First is the receive connector that issues the HELO/EHLO to verify the servers identity. This is done here. Make sure you enter the correct FQDN of the server. Once that is correct, test and if it fails do the following. At a command prompt type Nslookup then we set wat type of record we will query with.. set type=ptr Then enter your mail domain name. yourdomainnamenotthistxt it will then resolve, check that the record it replies with IS YOUR IP address. It will be in reverse. If there is no record, or the IP address is incorrect then contact your ISP and get them to change the record accordingly.This may take a day or so to replicate , then the mail should flow fine   Allen WhiteAllen is a Consultant for ITPS in the North East of England and holds the following accreditations. MCSA, MCSE, MCTS, MCITP, CCA, CCSP, VCP 4,5 and HP ASE, AIS - Network Infr
AM and 5.30 PM 550 5.7.1 client host rejected cannot find your hostname CEST. Contact our help desk directly by sending a 450 4.7.1 recipient address rejected ticket through the Controlpanel. Help desk Why is my e-mail being returned with client host rejected cannot find your hostname smtp the message 'Client host rejected: cannot find your hostname'? This error means that a computer has attempted to deliver e-mail without http://www.techieshelp.com/450-4-7-1-client-host-rejected-cannot-find-your-hostname/ a correct reverse DNS. Due to the large quantity of spam messages, it has regrettably proven necessary to refuse invalidly configured e-mails mail servers. Your system manager can rectify this by setting a correct reverse DNS for your e-mail server. If you https://www.transip.eu/question/100000031-returned-message-client-rejected-hostname/ do not know what this means, please send him or her the error message. This error message contains the address of the invalidly configured mail server. A detailed description about setting your reverse DNS can be found here Alternately, you can send the e-mail via your access provider’s SMTP-server. This usually is the smtp.provider.eu or mail.provider.eu. Rating: Relevant articles What is the E-mail Only service? How can I send and receive e-mail with my own domain? Can I change the delivering by e-mail with MX-records? Can I set up an automatic reply for my e-mail? How do I forward e-mail to another address? More results Terms Of Service Privacy policy Prices exclude VAT Copyright 2016
javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality. 450 4.7.1 Client host rejected: cannot find your hostname, Started by Ray K, Jan 24 2013 12:36 PM https://community.barracudanetworks.com/forum/index.php?/topic/21496-450-471-client-host-rejected-cannot-find-your-hostname/ Please log in to reply 3 replies to this topic #1 Ray K https://www.hmailserver.com/forum/viewtopic.php?t=10591 Ray K Members 1 posts Posted 24 January 2013 - 12:36 PM I have a user that is trying to send an email to a group at freelists.org, and when they send the email, they get this bounce back. This is the first time in many years of using this product that we cannot find have ever gotten this error message. The entire message is... hostname Use this forum if you have installed hMailServer and want to ask a question related to a production release of hMailServer. Before posting, please read the troubleshooting guide. A large part of all reported issues are already described in detail here. Post Reply Print view Search Advanced search 7 posts • Page 1 of 1 bytemind New user Posts: 20 Joined: 2007-06-19 13:43 Location: Copenhagen, Denmark Client host rejected: cannot find your hostname Quote Postby bytemind » 2007-09-26 11:09 Hi, I tried sending an email, and got this error back: Error Type: SMTP Error Description: Error message from remote server Message: 450 4.7.1 Client host rejected: cannot find your hostname, [86.58.131.134]. So i there something wrong with my DNS records or!? Top ^DooM^ Site Admin Posts: 13862 Joined: 2005-07-29 16:18 Location: UK Quote Postby ^DooM^ » 2007-09-26 11:21 You need to setup your RDNS to point to your domain name Top bytemind New user Posts: 20 Joined: 2007-06-19 13:43 Location: Copenhagen, Denmark Quote Postby bytemind » 2007-09-26 13:57 And in plain english? Top ^DooM^ Site Admin Posts: 13862 Joined: 2005-07-29 16:18 Location: UK Quote Postby ^DooM^ » 2007-09-26 14:23 ok your have a domain name i presume lets call this yourdomain.com Now when someone does a DNS lookup on yourdomain.com it will come back to your IP address. Now you can do a similar lookup on an IP address to get the domain name linked to that IP this is called the RDNS (Reverse DNS) If your RDNS does not match yourdomain.com some servers will block your mail as probable spam. I just did a lookup on 86.58.131.134 and couldnt find any domain linked to it. Top bytemind New user Posts: 20 Joined: 2007-06-19 13:43 Location: Copenhagen, Denmark Quote Postby bytemind » 2007-09-26 14:25 I got that But how do i set i up? Top Slug Moderator Posts: 1369 Joined: 2005-03-13 05:42 Location: Sydney Australia Contact: Contact Slug Website Quote Postby Slug » 2007-09-26 17:05 The compan