CentOS 5 Server :: How To Send Email Outside LAN Using Postfix
Jun 2, 2011
How can I send email outside my LAN using postfix? Actually, I can received email from outside like yahoo. hotmail etc.. But when I am trying to send outside in my mail server here is the error I got..
Jun 2 21:19:51 microtontech postfix/smtp: connect to k.mx.mail.yahoo.com[188.8.131.52]: Connection timed out (port 25)
Jun 2 21:20:10 microtontech postfix/smtp: connect to
I try to telnet yahoo.com and smtp.pldtdsl.net 25 here are the result, but when I try to telnet smtp.pldtdsl.net its showing trying only.. I checked if my ISP is blocking port 25 isn't. (I forgot what is the website I used to check if my ISP port 25 is block) I try already to used in my relayhost the [URL] but the email I sent still bouncing..But I remember last time when I was installed Hmailserver in my Win2K3 machine I sent email outside but I cannot received..
I'm experimenting with with mail-servers now and I'm trying to configure postfix to send emails from one email(pop3 is gmail) to any email outside the local network. Server is Ubuntu 10.10 with the last updates.
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: B0A5B22A06: to=<1and1emailaddress>, relay=mx00.1and1.co.uk[184.108.40.206]:25, delay=0.8, delays=0.04/0.02/0.62/0.12, dsn=4.0.0, status=deferred (host mx00.1and1.co.uk[220.127.116.11] said: 421 invalid sender domain 'xxxxmyserver' (misconfigured dns?) (in reply to RCPT TO command))
My company email server has been working flawlessly for the last 5+ years. Recently, one of our clients put their email server behind a firewall (an assumption on my part; details below). Ever since, email sent from within the company (192.168.xxx.xxx internal address; all computers and server is behind a NAT firewall [Netgear FVX538]) is either being sent to the client after some delay (if email is sent using Outlook) or is being deferred until the messages expire (Thunderbird, Squirrelmail, etc.). Email sent to the client from anywhere outside the company (using Thunderbird, Outlook or any other email client) is also delivered without any problems (usually after a short delay).
All other emails to the World are being sent without any problems at all (both inside and outside the company; using any email client or webmail). I did contact the client's postmaster, but the client, being a large government agency, will probably not address the problem (if it is on their side) anytime soon. I am not sure if I can do anything from my end to solve the problem. Ever since the problem with the client began, I added two statements to the postfix configuration file (smtp_pix_workaround_delay_time = 20s and smtp_pix_workaround_threshold_time = 0s); this seemed to a bit - it reduced the delay for emails sent via Outlook to a few minutes (as opposed to 30+ minutes); emails sent using Thunderbird/webmail are still being deferred.
Server details: Dual quad-core processor machine, 32 GB RAM, dual 1 gbps network, running Fedora 14 (64-bit; loosely modeled along the lines of Perfect Server (with ISPConfig2) as described on the howtoforge website). Running Postfix (v. 2.7.1), Dovecot (v. 2.0.9).
I emailed the client's postmaster suggesting they disable smtp fixup. But still, what bothers me now is that Outlook works (both within and outside the company) while Thunderbird, webmail, etc. (used by ~90% of the users) do not. In addition, all email clients from outside the company can send email (authenticated via the company server) to the client without any problems. Is there anything I can do on my end to make non-Outlook clients work within the company (webmail is hosted on the company server; so, it would have an internal address as well)?
I just set up a new email server on Debian Lenny. It's Postfix for MTA and Dovecot for IMAPS server. I use Dovecot for authentication. I have two UNIX users on the system (except root), one was added before the installation of Postfix and Dovecot. I'm not doing any virtual things, just plain UNIX users and one domain on a dynamic IP. The first user, "webadmin" can send and receive emails just fine through the server from my mail client.
Now I just added a new user, "scarleo", and it turns out I'm unable to send and receive emails with this account. If I log in (SSH) with scarleo I can use bash mail to send emails, works fine. scarleo can also receive emails from webadmin and can connect to Dovecot to read emails. However scarleo cannot send or receive to or from anyone outside the server from my mail client. I have restarted both Postfix and Dovecot after adding the user. Do I have to do something else to make this account work like webadmin's?
A few relevant lines from mail.log: (I've modded my real IP) Code: Dec 7 17:44:42 homer dovecot: imap-login: Login: user=<scarleo>, method=PLAIN, rip=18.104.22.168, lip=192.168.0.18, TLS Dec 7 17:44:42 homer dovecot: imap-login: Login: user=<webadmin>, method=PLAIN, rip=22.214.171.124, lip=192.168.0.18, TLS Dec 7 17:45:16 homer postfix/smtpd: connect from bredband.comhem.se[126.96.36.199] .....
I'm trying to set up a basic smtp server on my local computer that I can send basic, unencrypted email through on port 25. I installed postfix, and I chose the following options:
Internet Site, System Mail Name: localhost Root and postmaster mail recipient: I left this blank For other domains to accept mail, I entered : NONE, localhost No force synchronous mail updates Local networks: 127.0.0.0/8
I have postfix sort of working correctly. postfix can send email to the internet but it doesn't want to send email to my local exchange server. What I need is for postfix to send emails directed to @xyz.com to my exchange server instead of itself.
My setup mail.xyz.com - exchange 2003 server www.xyz.com - centos 5.3 server with postfix
www.xyz.com can send emails to my hotmail.com account so that part works correctly. www.xyz.com can't send email to firstname.lastname@example.org. postfix seems to be delivering the email to itself and not the exchange server.
How can I tell postfix to send the @xyz.com emails to my exchange server?
Here is a sample of my /var/log/maillog Jul 22 15:43:43 list postfix/smtpd: D63168604A3: client=localhost.localdomain[127.0.0.1] Jul 22 15:43:53 list postfix/cleanup: D63168604A3: message-id=<20090722204343.D63168604A3@www.xyz.com>
I've come across a strange issue where any email address that I email with mail returns an error "Bad Address"
Fairly new Centos 5.4 Install, sendmail is the MTA. Linux 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux DNS is working fine so there isn't a problem. [root@hn1 /]# host -t mx iol.co.za iol.co.za mail is handled by 10 mg1.iol.co.za. iol.co.za mail is handled by 10 mg2.iol.co.za. iol.co.za mail is handled by 30 vulpix.iol.co.za.
Yet when I try to use mail it fails: [root@hn1 /]# which mail /bin/mail [root@hn1 /]# ls -lrth /bin/mail -rwxr-xr-x 1 root mail 83K Jan 7 2007 /bin/mail [root@hn1 /]# mail -s "test" email@example.com Bad address Nothing in the maillog.
i need to configure postfix on centos to relay email from the internet to the Exchange Server and i also need that emails sent from the exchange within the same domain be sent to postfix then resent to exchange because i have spamassassin and clamav installed on centos to filter all incoming and outgoing mails ...
Currently i'm figuring out how to send email notifications to users when services went down in Nagios. I know i need to install and configure Postfix, which i did already. I assume that when i configured to point it to "Satellite mail system" is the correct one instead of other things like "Internet.." etc. So the configurations is when you have installed the Postfix and there would pop a lot of questions right? Other than that, what have i missed?
Oh ya, i remember something. Hmm. I do not have any so-called real smtp server so would that be alright? I heard that installed and getting the Postfix running would be enough as it serves as a MTA (mail transfer agent). So if i do not have any smtp server, the relay host= ' ' what should i put it as?
I am trying to setup a simple SMTP server to relay scanned documents from a Xerox machine to email addresses. Unfortunately the Xerox machine doesn't support TSL or SSL so sending mail over port 25 on gets blocked. I have setup postfix on a desktop running Fedora 13 and have been able to set it up to forward the mail onto the correct server (gmail for example). My question is, how do I get the server to encrypt the emails (scanned documents) when sending them over the internet?
I have tried adding:
Code: smtpd_use_tls = yes smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key But when I look at the wireshark capture of the sending I can read my test message in plain text.
I cannot get either sendmail or postfix to send a 220 response, nor respond with details. See below for sample telnet output. Details: I have a server that requires email, but only for light use. I'm definitely not an expert, but I have set up a sendmail configuration on a previous server. I tried to configure sendmail first and then postfix later, when I couldn't get sendmail working. I'm not sure exactly what the problem is, but I have a feeling the following might yield some important information. Note: this is the result for Postfix, but virtually the same thing happened with sendmail, too. That is, initially the telnet connection would close immediately. Afterwords, I could connect a second time but then it never responded with a 220 banner nor any 250's.
I'm not trying to setup a email server. ;) Firewall is set to disabled. SELinux is set to disabled.. How can i configure (which file?) the server to be able to send email out? When I try "mail -s testmail myemail@[URL]" and enter some text and then CTRL+D.. and return, I get command prompt again..
i have a small issue, to make our network more secure, i now require outgoing email to require authentication. Now the problem..i have a automated mailer that does not have the option to authenticate. is there a way to allow a certain email address or the local network to send out without authentication? If i cannot do this for a single email user to allow them through with authentication, how would i remove the authentication paramaters in the postfix smtp..
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.
I have a website sitting on my private server (CentOS 5x) running plesk 9.2.2. There is a form for customers to fill out and when they press send it sends the data to a specified email address and a BCC if desired (email address present in BCC Field) and and response to the person submitting the form. The problem I am having is everyone gets their email after the submit button is pressed except the person listed in the TO field. Below is the output from postconf -n and below that is the maillog
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?
Debian 5, apache 2.2 I've got Apache up and hosting multiple sites. Each site will have a php contact me page that will simply dump an email to a fixed address. What program should i be using to accomplish this? I've used nullmailer before but that assumes you have a fixed smarthost somewhere which I don't.
i m using code for sending email through GMAIL SMTP as given below... can any one tell me that how i can send EMAIL through Centos 5 CLI mode.... i which folder places i save my PHP files or any other supporting files etc.in graphical mode we use webbrowser but in Command line how i can use this project.... and also please tell me how i can run firefox in CLI mode
nstalled Postfix + Dovecot + Roundcube on a plain CentOS 5.5 box, let say on "site.com".I cant send or receive emails. When I try to telnet from both localhost and from the outside world, it can not reach the mail server.Testing itself on port 25:
I have CentOS 5.4 running my file server. I finally got proftpd to work. I configured logwatch to send me email on a daily basis however I would like to be sent an email immediately when the proftpd log file changes. Is this possible?
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 firstname.lastname@example.org on /etc/mail/virtusertableI regenerated sendmail.cf by user m4 commandrestart sendmail service.When I ran: Mial -s test email@example.comIt did not prompt any error message , in the maillog it says the message is queued but It can not be sent out
I'm stuck with postfix. It cannot send emails and I cannot find out why! smtpPort 25/tcp is open. I can telnet localhost with 25, but not the localhosts IP(192.168.1.15). Sendmail is OFF. Here is the main.cf file!
# 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