Hi I have a GPL virtualmin version installed on my server, I have only a IP asigned, and I have 3 mail domains in the server…
the hostname server is: admin.sysvirtuales.com and I have a reverse dns record for this host.
my problem is that some mail host (for example xalingo.com.br) give me a 550 error (hostname rejected), I created a SPF record on my dns server for the domain to solve this, but the problem still do it,
I need help to fix this, are the any solution for this… any help is apreciated…
Hi the domain that have the problem is int-rosenberg.net (when I send mails to xalingo.com.br I see the error) , the error says:
From: “Mail Delivery System” MAILER-DAEMON@admin.sysvirtuales.comTo: analucia@int-rosenberg.netSent: Wednesday, March 16, 2011 8:11 AMSubject: Undelivered Mail Returned to Sender > This is the mail system at host admin.sysvirtuales.com.>> I’m sorry to have to inform you that your message could not> be delivered to one or more recipients. It’s attached below.>> For further assistance, please send mail to >> If you do so, please include this problem report. You can> delete your own text from the attached returned message.>> The mail system>> adriano@xalingo.com.br: host a.mx.xalingo.com.br[201.35.66.25] said: 550> Hostname rejected. (in reply to RCPT TO command)>
Hrm, are you having problems sending mail to any other hosts?
I’m not sure that anything stands out as being a problem… your hostname looks correct. You have reverse DNS setup for your hostname. Your Postfix settings look good. And the “From” address of the email, “int-rosenberg.net”, has both forward and reverse DNS.
It’s possible the problem is with the remote server, and not with you… is it possible to contact them (via phone perhaps) and ask their sysadmin why they’re rejecting your email?