450 Error with Postfix

Posted by Shiv on Server Fault See other posts from Server Fault or by Shiv
Published on 2010-05-12T05:44:59Z Indexed on 2010/05/12 5:55 UTC
Read the original article Hit count: 262

Filed under:

postfix

|

admin

|

emailserver

I have setup postfix to send outgoing mail, It works fine for most of the cases except for some e.g duke.alumni.edu where it gives me a 450 error, even though the email address is valid.

This is the exact error I get Sender address rejected: Domain not found (in reply to RCPT TO command))

Any suggestions on how I can rectify this?

© Server Fault or respective owner

Related posts about postfix

postfix: Temporary lookup failure

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have followed the tutorials step by step for installing and configuring postfix https://help.ubuntu.com/community/Postfix https://help.ubuntu.com/community/PostfixBasicSetupHowto I am trying to test the services to whether Temporary lookup failure error telnet localhost 25 250 2.1.0 Ok rcpt to:… >>> More
postfix with mailman

as seen on Server Fault - Search for 'Server Fault'
What should happen is that [email protected] should be delivered to that users inbox on localhost, user@localhost. Thunderbird works fine at reading user@localhost. I'm just using a small portion of postfix-dovecot with Ubuntu mailman. How can I get postfix to recognize the FQDN and deliver… >>> More
saslauthd + PostFix producing password verification and authentication errors

as seen on Server Fault - Search for 'Server Fault'
So I'm trying to setup PostFix while using SASL (Cyrus variety preferred, I was using dovecot earlier but I'm switching from dovecot to courier so I want to use cyrus instead of dovecot) but I seem to be having issues. Here are the errors I'm receiving: ==> mail.log <== Aug 10 05:11:49 crazyinsanoman… >>> More
centos postfix send email problem

as seen on Server Fault - Search for 'Server Fault'
Hello. I have a big problem with postfix. I can receive mail in webmin and outlook but I can't send (only on local I can - user to user). Dovecot is working just fine. Sendmail is disable. Please help me. postfix -n postfix: invalid option -- n postfix: fatal: usage: postfix [-c config_dir] [-Dv]… >>> More
Migrating users and mailboxes from postfix / Maildir to Postfix with Mysql backend

as seen on Server Fault - Search for 'Server Fault'
So I've got 60 or so users on a hand rolled postfix installation on openbsd and I'd like to move their mailboxes to our new mail server running iRedMail (postfix, vmail/mysql back end) Does anyone know of a good way to do this? Preferably a script I can run to keep syncing the users mailboxes as… >>> More

Related posts about admin

Django-admin.py not working (-bash:django-admin.py: command not found)

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm having trouble getting django-admin.py to work... it's in this first location: /Users/mycomp/bin/ but I think I need it in another location for the terminal to recognize it, no? Noob, Please help. Thanks!! my-computer:~/Django-1.1.1 mycomp$ sudo ln -s /Users/mycomp/bin/django-admin.py /Users/mycomp/django-1… >>> More
Macports irssi & perl5 installation issues

as seen on Super User - Search for 'Super User'
Long time reader, first time poster. Big, appreciative thanks for everyone's collective questioning and answering here and at stackoverflow, it's helped me quite a lot over the time I've been learning answers through these sites! Apologies in advance if I didn't search hard enough on posts already… >>> More
Django: Using 2 different AdminSite instances with different models registered

as seen on Stack Overflow - Search for 'Stack Overflow'
Apart from the usual admin, I want to create a limited admin for non-staff users. This admin site will have different registered ModelAdmins. I created a folder /useradmin/ in my project directory and similar to contrib/admin/_init_.py I added an autodiscover() which will register models defined… >>> More
is there any way to have admin privileges in non-admin accounts in xp

as seen on Super User - Search for 'Super User'
I mean, like in windows 7 that you can access the files of other users only if you provide a correct password. Is there any way that we could implement this kind of OS behavior in xp? >>> More
Windows 7 - Non Admin run as Admin for Explorer - still can't see all tmp internet files

as seen on Super User - Search for 'Super User'
I'm trying to retrieve video files from the IE 8 cache for a user that's not an admin in Win 7. As a non admin user, I run Explorer as admin and still can't see the temp internet files for the non admin user. Only if I login as a user that is admin can I see the files. Is there any way I can… >>> More