General :: Send Mail From Domain As A User That Does Not Exist As Well As Email From Other Non-existent Domains
Jul 31, 2010
I have a server with a static IP that I use as a sendmail server. The problem is that port 25 is exposed. As a result, anybody can login to the SMTP server and send mail from my domain as a user that does not exist as well as email from other non-existant domains. I'm sure there are sendmail options that I can enable to do some checks, like if the user exists on that server or if the domain is the same on the server, etc. I was wondering if you guys can mention a few that I can add to my sendmail.mc file?
I have thought about auth login, the problem is if auth login is on my public port then I won't be able to receive email from gmail because it would be unauthenticated. Also, I only have 1 mail server. I know the ideal solution is to have 2 mail servers. One for outgoing mail/internal mail server where you can enable auth login and the other for incoming mail which just acts as the relay to the internal mail server. That way spammers can't login to send mail out. That's another question I had, how do I configure sendmail to only send email out/in?
Anyhow, so I have to make do with 1 mail server for now. So I decided to add a few rules on iptables. I grabbed the IP range that gmail uses when I receive mail from then and added it to my iptables with the following command.
[Code]....
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Jun 14, 2011
I want to configure a single mail server to send and receive mail from multiple sub domains of my domain. I've already installed Postfix/Dovecot and it is perfectly working for mydomain.com. And also installed roundcube for Web Mail. Can I further customize this setup to process mail to sub domains? ex- someone@subdomain1.mydomain.com, someone@subdomain2.mydomain.com, someone2@subdomain1.mydomain.com (someone@subdomain1.mydomain.com and someone@subdomain2.mydomain.com are 2 separate users. they should be able to log on to web interface separately)
Currently i use system account names as email user names. (ex - systemusername@mydomain.com). The only MX record in my domain DNS pointed to current server (mailhost.mydomain.com). I read about postfix virtual domains. but couldnt figure out how to use it to achive my target. I do not need configuration details. Just explain me the way to do it. I can do the rest my self.
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May 28, 2011
How to restrict users to send mail to outside domains in qmail server, i have centos and qmail installed
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Jan 9, 2010
I've set up a mail server using Postfix + dovecot. It works just fine sending email to users in my domain. However, I can't send email to external domains (like gmail, yahoo, etc) different than mine. I've tried sending from a remote connection using Evolution and I get the following message on mail.log
Jan 8 10:45:20 mail postfix/smtpd[14911]: connect from unknown[]
Jan 8 10:45:21 mail postfix/smtpd[14911]: NOQUEUE: reject: RCPT from unknown[]: 550 5.1.1 <lobomacz@gmail.com>: Recipient address rejected: User unknown in local recipient table; from=<user@mydomain.com> to=<lobomacz@gmail.com> proto=ESMTP helo=<[10.24.4.230]>
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Jan 15, 2011
I use gmail for all of my emailing needs but stumbled upon linux counter at counter.li.org. Now I registered on the site and downloaded the machine-update script from the site. So I ran it and it collected the required data. But when I run ./machine-update -m as they have told, I guess no mail gets sent as I have to configure the mail program. How do I configure it so that it sends mail from my gmail address using stmp?
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May 4, 2010
I have one major problem in my mail server. I am not able to send mail to other domain yahoo and rediff. and my ipaddress is blacklisted. So Finally I checked logs. Mail queue is high. Log shows spam and junk mail created in my mail server. he following are the logs. Iam using qmail server. One more thing is in link is there when I click that link its go sex websites. I will try all mail queue logs. It shows the same website redirection. So I don't know its happen. My thought is spam create from that website.
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Jun 8, 2011
How to configure a Debian mail server as a user send a mail with attachment maximum wight is 5 Mb.
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Nov 25, 2009
I am unable to send mail to outer world using SMART_HOST
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Jun 3, 2009
Send an E-mail to your local account. Try two different ways to send and read it. How can you check that it really arrived? I decided to try using the 'mail' and 'pine' commands. So:
1) Using the root account, intending to send an e-mail to myself (root):
Code:
# mail -s "Hello root!" root
Simple form of sending e-mails internally.
^D (this keystroke is to finish the e-mail)
EOT
2) Using 'pine', another e-mail client: The mail is composed correctly, with 'To:' field set to:
Quote:
[URL]
which is my hostname, as my box runs in a VMWare Slack 12.2 image. In both cases, nothing was received in my mailbox (by typing #mail)... Additionally I don't see any new e-mails when I look at the file '/var/spool/mail/root'. Do I need extra information configuring my mail client/server/service?
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Nov 5, 2010
Let me start off by saying I am experienced with computers, though my knowledge of Linux and networking is limited. I've just recently started setting up a Ubuntu 10.04 server to be a SMTP server. I've followed this guide by the letter: [URL] What I've attempted, to test the server, is the following:
telnet localhost 25
ehlo localhost
(this returns all the desired information) I then do a MAIL FROM my domain which is accepted, and try to do a RCPT TO an external mail server (gmail) to test sending an email. I am then told 'Relay Access Denied'. I'm sure that there's something fundamental that I'm either not understanding or not doing correctly. I simply want an SMTP server that can send to other domains. What do I need to do?
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Jan 12, 2010
I've been trying to send mail to email account even after installing postfix but am not able to do so.My distro is Centos 5.4. I followed the Centos user guide to install and configure postfix into the server,
Code:
http://wiki.centos.org/HowTos/postfix
but still didn't receive any email.
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Sep 9, 2010
this is my code at the moment
PHP Code: <?php
if (isset($_REQUEST['email'])) && $_REQUEST['email']!='0'{
$to = "chrisathisemail";
[code]....
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Nov 22, 2010
easier way to forward email, in postfix, from a user to one domain for the user without listing every domain and user name? Example:send all of user joe's email to joe@somewhere, in which there are mulitple domains other than "somewhere".
Usual Given Example-
/etc/postfix/virtual:
joe@example.com joe@somewhere
jane@example.com jane@somewhere-else
[code]....
I'm looking for an easier way to forward email, verses having (ex) 50 different lines for 5 users and 10 domains.
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Dec 29, 2010
I scan a document with root pressing the scanner button. I would like to send an email using my gmail account. OK. nothing difficult with that... mbsmtp + mutt for sending trhough the sh script.
1-root is to be avoided at max to do some internet duties, due to security. Apt-get is good, but ok surfing or email sending shall be avoided for higher security.
2- sudo or su running mutt through this way, ok, using an existing user. OK, possible and simple, but not comfortable since you have to use an account of an user existing (create a new user for scanner and email?? - no, come on, we have linux and can maybe find a solution)
how to send an Email from root console using an non created USER?
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Jan 13, 2010
i have running sendmail 8.13 on my red hat enterprise linux 5.1, but i have a problem. I can send a mail from my line command terminal to hotmail, gmail, yahoo and any of these, but i can't send mail to my own domain ([URL]), when i wrote a mail i get a reply from MAILER-DAEMON@localhost.localdomain that says that the message had pemanent fatal errors and shows as user unknown the mail was suposed to recive the message.
For example, if i send one mail from user1@mydomain.com to user2@mydomain.com the user2 does not recive any mail, but that doens not happens if user1 sends a mail to any hotmail address or gmail or any other. Besides i also can't recive on my server any mail to user1@mydomain.com or user2@mydomain.com (for example), so please tell me what do i do to get the mail.
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Jun 19, 2010
I am using Qmail mailing system. Now I want to block the outlook users to send mail(SMTP). I think it can be done through qmail smtp relay option.Is it the right way to block SMTP for outlook users??
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Feb 12, 2009
I have a CentOS 5.2 server with hostname support.companyname.local It's used to run Request Tracker 3.8.1. I need to be able to send email from this machine and make it look like the email came from user@companyname.com instead of user@support.companyname.local
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Feb 22, 2011
There is an requirement, intranet people they may not have internet access but they want to send mail to external domain(internet),but in that intranet network one machine can have internet access. Is there any solution for this requirement.
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Jan 21, 2010
I have an issue with sendmail. I need to configure sendmail to send email from command prompt to any domain. This is just for the notification purpose. I installed sendmail and sendmail-cf and sm-client. The following are the configuration I have done.
/etc/mail/sendmail.mc
1) dnl # DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
2) m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf
3) /etc/hosts = 127.0.0.1 localhost.localdomain
/etc/hosts = 192.168.2.50 mysystem
4) /etc/hosts.allow = sendmail:ALL
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Sep 8, 2010
After a reboot of my VPS, I keep getting the following error when sending email to my domain (hosted on Google Email). I can send to other email addresses but my own. So it seems like postfix thinks all mydomain.co.nz is to be sent internally?
Sep 9 09:25:05 mydomain postfix/pickup[20784]: 0316C3CC68: uid=1000 from=<sidb>
Sep 9 09:25:05 mydomain postfix/cleanup[20806]: 0316C3CC68: message-id=<20100908212505.0316C3CC68@mydomain.co.nz>
Sep 9 09:25:05 mydomain postfix/qmgr[20783]: 0316C3CC68: from=<sidb@mydomain.co.nz>, size=326, nrcpt=1 (queue active)[code].....
How do I tell postfix that mydomain.co.nz is to be sent to Google email server?
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Jun 4, 2015
I ran this command from terminal.
Code: Select allmail -s "Test Subject" example@yahoo.com < /dev/null
Got error on command line:
Code: Select allsend-mail: Authorization failed (534 5.7.14 https://support.google.com/mail/answer/78754 ng13sm2265977pdb.82 - gsmtp)
ssmtp configuration file:
Code: Select allroot=ssmtpmailtesting@gmail.com
mailhub=smtp.gmail.com:587
#rewriteDomain=
hostname=mybox
UseSTARTTLS=YES
AuthUser=ssmtpmailtesting@gmail.com
AuthPass=[mypassword]
FromLineOverride=YES
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Aug 11, 2011
I'm trying to setup notification function for the Nagios Core which use Mail to send notification.I got an account from Rogers. I have SMTP server, email account with authentication information.My Nagios server is in a workgroup, there is now domain assigned to it, I just use nagiosserver.localdomain in /etc/hosts.I added Rogers SMTP server in /etc/mail/sendmail.mc and Future (AuthInfo) I created an /etc/mail/AuthInfo and add AuthoInfo:smtpserver "U:user" " P: pwd" "M:Plain"I added smtp server in /etc/mail/access for RelayI added root@nagiosserver.localdomain on /etc/mail/virtusertableI regenerated sendmail.cf by user m4 commandrestart sendmail service.When I ran: Mial -s test nagios4ccs@rogers.comIt did not prompt any error message , in the maillog it says the message is queued but It can not be sent out
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Mar 29, 2010
I am thinking about buying a domain name and hosting my web server.
I have seen pricing from $8 to $30 a year. Any favorites from fellow ubunters? Also this whole "whois" thing scares me, if I am correct my information I enter when buying the domain is enter into some big pool of information. People can find this information out and dig up important information. url Can I prevent this with private Whois or how do I set it up? This website examples some of my fears with this whole WhoIs thing, url whois/Private-Whois.html Does most/all domain registers come with email or just email forwarding or both? How does that work? At this moment, my only question about Web Hosting is how do I get Website Statistics as in: Stats, web analytics, web traffic stats and more? I will be web hosting through Ubuntu 9.10 gnome.
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Apr 26, 2010
I am managing a Fedora dedicated server with Plesk 9 and just recently moved the email for one of the domains on the server to Google Apps for business. Unfortunately, I cannot get email messages from the website forms to deliver to addresses on this domain. For anyone familiar with Plesk, I have disabled mail in the hosting settings by un-checking the "Activate mail service on domain" checkbox and there are no accounts in the domain. (Other readings have indicated that this should be enough to allow mail to be directed to the appropriate server). My MX records correctly point to the google apps mail server.
I'm quite comfortable with command line, but I know almost nothing about the sendmail program or its alternatives and my attempts at researching how to set up this relay has been futile. I'm pretty sure I'm using sendmail and not qmail or anything else from what the red-hat style "alternatives" symlinks point to. I've also checked the /etc/mail/access, domaintable, mailertable, sendmail.cf, virtusertable, local-host-names, sendmail.cf, and submit.cf and most of these files are empty (except the .cf files), and the sendmail.cf and submit.cf make no reference to the domain in question.
Here is the output from a sendmail test that was was not received. (Private data omitted of course).
sendmail -v xxx@yyy.com
test email from yyy.com webserver. please ignore.
xxx@yyy.com... Connecting to [127.0.0.1] via relay...
220 my.server.com ESMTP
>>> EHLO my.server.com
250-my.server.com .....
Closing connection to [127.0.0.1]
>>> QUIT
Performing the same test and sending an email to a non-hosted domain works fine.
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Jan 29, 2010
I just configured my first postfix mail server today. Everything is working correctly except for the fact that on all outgoing emails instead of the mail format being user@mydomain.biz it says user@hostnameofpostfixserver. I've looked everywhere I can think and I cant see where I'm substituting the host-name of the server for the domain name of my email. Where else could it be?Below is my main.cf. I am running ubuntu 9.10.# See /usr/share/postfix/main.cf.dist for a commented, more complete version# Debian specific: Specifying a file name will cause the first# line of that file to be used as the name. The Debian default
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Mar 17, 2010
I'm running a desktop-less version of Debian via Sun VirtualBox. The reason I'm doing this is because I don't have enough graphics or RAM power to have a desktop environment running on top of my current desktop; also, I want to learn Linux through the command prompt. I'm running the AMD64 version of Debian; I'm not sure if that's relevant.
My main goal is to be able to email useful files from the virtual Debian to my main computer, so that I can save them for later if I ever decide to do a "real" installation of Debian on this computer. I realize now that there's probably some "easy" way to do this by reading the virtual machine's hard drive, but at this point, my curiosity wants to see this issue resolved. I started off wanting to find a command-line program to send my email with, and one was built-in. The syntax ~$ sudo mail -s "Subject" email@yahoo.com "This is a test email."
C^D
Cc:C^D ~$
is what I found. I tried it, and (unsurprisingly), it failed. I then learned that the mail command calls exim4, or something along those lines, so I needed to configure exim4. Soon thereafter, I learned that Yahoo's SMTP wasn't public, but Google's was. So, I found this web page which described how to configure exim4 to allow for email to be sent to a Gmail account. I made one, and followed the page word-for-word.
I sudo-mailled a test email to my Gmail account, and nothing happened. I waited a bit longer, and still, nothing happened. Finally, I started looking around, and found out about the exim4 logs in /var/log/exim4. In my mainlog, I think that it's telling me that Google denied my connection: <date><time><random numbers and letters> == **********.gmail.com R=send_via_gmail t=gmail_smtp defer (111): Connection refused
So, now, I'm just stuck. I don't know what I did wrong, I checked my exim4.conf.template twice for spelling errors, but I don't think I made any. At this point, I can only hope that someone else has had a similar problem, or knows what I'm doing wrong (or haven't done yet).
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Aug 9, 2010
what do I need to change in postfix/ dns to send email to one one of the email server hosted by 1and1.
I'm using zenoss to monitor system/ network and devices. I wanted to setup email notification , so I installed postfix. All works fine when I use my private account on yahoo or hotmail. but when I specify email account that is hosted by 1and1 I receive error 421. "
xxxxmyserver postfix/smtp[5399]: B0A5B22A06: to=<1and1emailaddress>, relay=mx00.1and1.co.uk[212.227.15.169]:25, delay=0.8, delays=0.04/0.02/0.62/0.12, dsn=4.0.0, status=deferred (host mx00.1and1.co.uk[212.227.15.169] said: 421 invalid sender domain 'xxxxmyserver' (misconfigured dns?) (in reply to RCPT TO command))
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Mar 4, 2011
I'm trying to configure postfix so smart daemon can send out notifications emails. My system will need to send emails to a mail server that is on the same local network. I have not had much luck in getting this to work, and am confused on what I need to setup to do this and how to set it up. Does my system need to be apart of the same domain as the mail server? If so, how do I do this? Is there any restrictions sending emails from the command line as the root user? Do I need to configure a relayhost?
Basically all I need to do is send emails to a local mail server, i.e. a mail server on the same local network. I do not need to receive emails. I am rather clueless as to how to set this all up, and what I need for this basic email functionality. I have read and tried many postfix configuration tutorials, but when I try to send out a test email to a email address on the local network mail server I always get "Connection refused" to the server and deferred or bounced status on my test email.
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Dec 27, 2009
I have a CentOS 5.4 nas box that I want to monitor.
I believe I can setup mdadm to mail me when there are issues by addin the following line to /etc/mdadm.cong Quote:MAILADDR root
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Feb 5, 2010
I'm having a problem with my mail. When I send mail, it takes a long time for the send to complete.In the below, datestamp is just a simple script to put in a no-white-space date/time stamp.
Code:
$ datestamp ; mail woodnt; datestamp
02-05-10@193844
[code]....
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