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i am a newbie to linux, i am working on a new project with new company. i got a problem. we have a linux webserver. on which all the webhosting is done. but suddenly we are not able to send mails from outlook to outside. incoming is fine and we can send internal mails. but if i send a mail to yahoo or hotmail its coming up , with a box saying that the email address has been rejected. can u plz tell me how to restore that service.
You should be more specific, what is the exact error message? Does your server have a valid RMX record? Can you send mail to some other addresses? Has your server been used by a spammer and blacklisted as a result?
it worked fine till last week. but when we try to change the ftp settings to upload the site .. all the thing went down. sendmail is working fine. we are able to send and receive mails internally. but cant for outside. and normally when we send/receive emails . it should be mail.domain.com. but our server doesnt accept it. i want to know how to configure mail and how to configure ftp on our linux server. if u r in uk i am more happy to call you . becuase its a mess
Well... I'm traveling outside Europe right now. And I am not a Linux wizard. I understand you have a serious problem. All I can do is to point on some things.
First, ftp is a hackers favorite for breaking into your system and has to be configured very carefully.
Second, almost every distro has scripts for basic configuration tasks, 'mailconf' may work for you. 'linuxconf' is another script you may want to run.
These scripts may be not installed, look at your diostro's homepage how to get them and wht are their exact names. I strongly recommend to familiarise yourself with your distro. Take your time doing this.
All cofiguration files are kept in /etc , usually they are commented. Use man pages for details. For instance, 'man fstab' gives you info about mounting etc.
The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'email@example.com'. Subject '', Account: '192.168.242.225 (1)', Server: '192.168.242.225', Protocol: SMTP, Server Response: '550 5.7.1 <firstname.lastname@example.org>... Relaying denied. IP name lookup failed [192.168.242.1]', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79
this is what i am getting . can u tell me how to solve this problem on linux./
I'm guessing now.
Your server shouldn't identify itself as from 192.168 private network. Out there are different servers running on different software and doing different checks before they accept your mail. Your server must be sending from a real IP address in order to be accepted and have a valid name (and MX record), some servers do reverse DNS lookup before accepting (you must have a RMX record for these).
Have to go now, good luck.