Re: Mail sending problem.
2009/11/13 Manoj Burande manoj.bura...@artificialmachines.com: presently used parameters in main.cf configuration file is as follows: No, please show the output of `postconf -n` when describing your configuration. The contents of main.cf is less useful as it doesn't accurately describe the configuration Postfix is using. But whenever I am trying to send an I got following mail logs: Nov 13 14:31:02 r1 postfix/smtp[2295]: D19DC8FE063: to=manoj.bura...@artificialmachines.com, orig_to=r...@textwand.com, relay=mx2.abac.com[216.55.191.203]:25, delay=35, delays=0.01/0.01/33/1.9, dsn=4.1.8, status=deferred (host mx2.abac.com[216.55.191.203] said: 451 4.1.8 Domain of sender address r...@textwand.com does not resolve (in reply to RCPT TO command)) This is quite clear. The sender address is r...@textwand.com. The remote server (mx2.abac.com) is unable to (DNS) lookup textwand.com, so it refuses to accept the mail. You have no useful DNS records for textwand.com, so this is pretty reasonable. http://www.robtex.com/dns/textwand.com.html
Re: Mail sending problem.
Hi Barney, Here I just wanted to explain you that what exactly I am trying to do is, 1] I am trying to configure postfix mail server that can only send mails. It receives no mail from the network. 2] The MX records tell the world which server will accept inbound mail for your domain. They have nothing to do with sending outbound mail. That's why I have not made any DNS entry for my domain textwand.com. 3] Locally generated mails will be forward ALERT / INFO /CRITICAL notifications generated by my local syslogd to me. I want generated log reports to go to my manoj.bura...@artificialmachines.com account. 4] I have hosted my JAVA application on the same server. And it will generate mail to deliver to the users. e.g. mmbura...@gmail.com / yahoo.com or manoj.bura...@artificialmachines.com etc..In short it will deliver mail on the internet to other domain users. Here I am providing you the output of postconf -n. Please guide me if I am doing anything wrong. Please... [r...@r1 ~]# postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 html_directory = /usr/share/doc/postfix-2.5.6-documentation/html inet_interfaces = loopback-only mail_owner = postfix mailbox_size_limit = 0 mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = textwand.com, localhost, localhost.localdomain, localhost myhostname = mail.textwand.com mynetworks = 127.0.0.0/8 myorigin = textwand.com newaliases_path = /usr/bin/newaliases.postfix notify_classes = resource, software, bounce queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.5.6-documentation/readme recipient_delimiter = + relayhost = sample_directory = /etc/postfix sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_banner = $myhostname ESMTP $mail_name unknown_local_recipient_reject_code = 550 2009/11/13 Manoj Burande manoj.bura...@artificialmachines.com: presently used parameters in main.cf configuration file is as follows: No, please show the output of `postconf -n` when describing your configuration. The contents of main.cf is less useful as it doesn't accurately describe the configuration Postfix is using. Â Â But whenever I am trying to send an I got following mail logs: Nov 13 14:31:02 r1 postfix/smtp[2295]: D19DC8FE063: to=manoj.bura...@artificialmachines.com, orig_to=r...@textwand.com, relay=mx2.abac.com[216.55.191.203]:25, delay=35, delays=0.01/0.01/33/1.9, dsn=4.1.8, status=deferred (host mx2.abac.com[216.55.191.203] said: 451 4.1.8 Domain of sender address r...@textwand.com does not resolve (in reply to RCPT TO command)) This is quite clear. The sender address is r...@textwand.com. The remote server (mx2.abac.com) is unable to (DNS) lookup textwand.com, so it refuses to accept the mail. You have no useful DNS records for textwand.com, so this is pretty reasonable. http://www.robtex.com/dns/textwand.com.html -- Manoj M. Burande, Artificial Machines Pvt Ltd, System Administrator.
Re: Mail sending problem.
2009/11/13 Manoj Burande manoj.bura...@artificialmachines.com: Here I just wanted to explain you that what exactly I am trying to do is, 1] I am trying to configure postfix mail server that can only send mails. It receives no mail from the network. 2] The MX records tell the world which server will accept inbound mail for your domain. They have nothing to do with sending outbound mail. That's why I have not made any DNS entry for my domain textwand.com. This is reasonable. *However*, most mail providers tend to reject mail from domains like yours, which have no DNS records. There's theoretically nothing wrong with your setup, but given that most email nowadays is spam, mail providers are only interested in legitimate looking mail. Furthermore, mail should be able to go back to the sender for accountability, such as spamming problems and administrative issues. It's basically, if I can't contact you, then I'm not interested in your mail. See further down for more notes. 3] Locally generated mails will be forward ALERT / INFO /CRITICAL notifications generated by my local syslogd to me. I want generated log reports to go to my manoj.bura...@artificialmachines.com account. 4] I have hosted my JAVA application on the same server. And it will generate mail to deliver to the users. e.g. mmbura...@gmail.com / yahoo.com or manoj.bura...@artificialmachines.com etc..In short it will deliver mail on the internet to other domain users. Big, free providers like Gmail and Yahoo are *very* strict on things like this. Yahoo is notoriously difficult to get mail to sometimes, as an example, but your mileage may vary. Here I am providing you the output of postconf -n. For outbound-only mail that generally looks okay. It's worth noting that some mail servers will perform sender callback, where they attempt to connect to the MX of the sending domain (again, they want to check that the sender will also receive mail, in case of problems, abuse, etc.). Because you're only listening on loopback addresses, you may fail that check on some servers, so they'll refuse your mail. It's difficult to make a comprehensive list of things you can/should do to successfully send mail, but having DNS records would be an important step - you don't *have* to accept inbound email, but it'll help your legitimacy.
Re: Mail sending problem.
On 2009-11-13 Manoj Burande wrote: Here I just wanted to explain you that what exactly I am trying to do is, 1] I am trying to configure postfix mail server that can only send mails. It receives no mail from the network. 2] The MX records tell the world which server will accept inbound mail for your domain. They have nothing to do with sending outbound mail. That's why I have not made any DNS entry for my domain textwand.com. Since I was the one who gave you this advice: you can send e-mail perfectly fine without having any DNS record for your server. However, as Barney already pointed out, the MXs of other domains may refuse to accept mail from your server unless it does have valid DNS records. That's one of the reasons why you'd normally relay mail from such hosts through some official mail server (e.g. your company's or your ISP's MTA). The null client standard configuration example to which I had pointed you used a relayhost (for a number of other reasons, too). Why didn't you stick with that? Regards Ansgar Wiechers -- All vulnerabilities deserve a public fear period prior to patches becoming available. --Jason Coombs on Bugtraq
Re: Mail sending problem.
On Fri, Nov 13, 2009 at 06:27:59PM +0100, Ansgar Wiechers wrote: On 2009-11-13 Manoj Burande wrote: Here I just wanted to explain you that what exactly I am trying to do is, 1] I am trying to configure postfix mail server that can only send mails. It receives no mail from the network. 2] The MX records tell the world which server will accept inbound mail for your domain. They have nothing to do with sending outbound mail. That's why I have not made any DNS entry for my domain textwand.com. Since I was the one who gave you this advice: you can send e-mail perfectly fine without having any DNS record for your server. No, the server itself need not have MX records and its hostname need not match the envelope sender domain. The server must have matching PTR and A records, and the envelope sender domain must be valid (have MX or A records). Processing bounces and spam complaints is NOT optional. There is no such thing as send-only email, once one takes non-optional list management into account. -- Viktor. Disclaimer: off-list followups get on-list replies or get ignored. Please do not ignore the Reply-To header. To unsubscribe from the postfix-users list, visit http://www.postfix.org/lists.html or click the link below: mailto:majord...@postfix.org?body=unsubscribe%20postfix-users If my response solves your problem, the best way to thank me is to not send an it worked, thanks follow-up. If you must respond, please put It worked, thanks in the Subject so I can delete these quickly.
