MTA stands for Mail Transfer Agent. An MTA is a server-side program which accepts and transmits email messages on behalf of end users. Examples: sendmail, postfix, qmail.

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On debian, how to set up a MTA like exim that allows per user smarthost configuration?

I have a problem setting up something that I think would be cool. I have a server (Debian Wheezy) and I would like to let my users send email from their smarthosts. From what I have read, exim allow ...
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11 views

Postfix stops responding after adding virtual account config

I am trying to configure postfix to work with virtual hosts using Centos 6.5. I am trying to recieve emails for paul@git.exampe.com. (I actually run different domain than example.com, but the third ...
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2answers
37 views

Error sending emails from a mail server relay type falling into the spam folder (using postfix)

Here I show one of the emails that come to Yahoo, which are falling directly into SPAM folder. The SPF goes smoothly, the DKIM passes without problem, even DMARK passes without problem, but just keep ...
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1answer
119 views

postfix - connection refused from behind NAT

When attempting to telnet postfix from a different host in the same LAN through the FQDN (and thus the LAN's public IP), the following error occurs: root@mailer:/var/log# telnet mail.domain.com 25 ...
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0answers
196 views

Postfix - suspend domain from which deferred status was received?

Is there a possibility to make Postfix stop trying (for a period of time) to send emails to a domain from which it received a deferred response? Currently my Postfix goes through each address in the ...
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22 views

Mail not piping in postfix

I have setup a postfix server and wanted to test the piping of mail to my perl script where i can make use of it and filter the mails.I wrote a test script for that which just logs the information in ...
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41 views

Mailx not reporting the IP the mail was sent from in header?

In the Header file of the final mail on y local server using postfix i am not able to see the Sender's ip which is usually under received from. From root@testmailer.com Wed May 28 12:26:54 2014 ...
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91 views

How to change IP address according to sender in Postfix?

I need help.I am stuck for too long now.I have setup a postfix server on my system.Now i want to change the IP corresponding to the sender.For that i used sender_dependent_transports and configured ...
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1answer
51 views

Postfix selectively enforce TLS

I am running postfix in Debian Wheezy as my MTA. I currently have it configured to require secure connections for SMTP. In main.cf I have: smtpd_tls_auth_only = yes smtpd_tls_security_level = ...
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1answer
256 views

Postfix limit number of emails send in a month/Day

Is it possible to limit the users to send total email in a month/day. I am trying to enforced marketing users to send newsletter according to their assigned quota. Example 1. user1@example.com: can ...
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1answer
188 views

Multiple mail servers for a single domain [closed]

Running a "DNS scan" to make sure my DNS zones are setup "correctly" led to the suggestion by the tool to run more than one mail server for redundancy. It got me thinking about how one would implement ...
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2answers
251 views

Google blocks authentication attempts by my machine to transfer outgoing mails [closed]

I am using gmail as SMTP server (via ssmtp mail transfer agent in Ubuntu 12.04) for sending outgoing mails from my server. But the problem is that Google often blocks authentication attempts by my ...
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1answer
64 views

exim produces failed to read delivery status for user

OS: FreeBSD9 64 Bit MTA: Exim with SA-Exim, Auth-Radius, Content Scan options I use exim -v user with default install (without even tweaking anything) LOG: MAIN PANIC failed to read delivery ...
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2answers
617 views

Is it ok to use self-signed certificates for smtp transport?

By "by ok to use" I mean: are MTA agents receiving emails from my server going to reject my email if not, are they going to make other kind of bad treatment for my emails (marking as spam, unsafe ...
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2answers
911 views

Exim on Centos - Configuring gmail smtp

I want to set up Exim to send the mails through my gmail (actually my domains google apps). I have added the router, transport and authenticator. Specifically: gmail_route: driver = manualroute ...
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1answer
221 views

Exim4: How to add or rewrite Reply-to: header in outgoing messages?

How can I configure exim header rewriting to take care of forgotten Reply-To: headers in emails leaving our company? We want to have certain Reply-To: headers added to all official emails leaving ...
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3answers
742 views

Sendmail: Sender address rejected (Domain not found)

I'm running into problems with sending mail on our webserver. Some mails are sent and delivered without any problems (eg Gmail), while others are deferred with "Sender address rejected: Domain not ...
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49 views

Slow mail with MTA

I am using PHP to send mail. I've tried both the native php function and the php mailer and I have excluded that it would be PHP causing the sluggish and slow behavior. My issue is that it takes ...
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3answers
842 views

Postfix can not send to some mailservers: 'not logged in'

I have setup a Postfix stack (with Dovecot and Spamassassin, ClamAV + Amavis) which is working pretty good, actually. It relays my emails (I am using Thunderbrid as client) to other mailservers. I ...
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56 views

Postfix: Server to Server encrypted communication

I just built a Postfix, Dovecot and Spamassassin (ClamAV + Amavis) stack on my dedicated server. In the last two years I was using iredmail, wich was OK, but I was a bit sceptical because of my lack ...
2
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1answer
82 views

Exim retry is Message based instead of host based? why

from what I understand exim retries are supposed to be HOST based, NOT message based. This seems to make sense to me; if a host's server is overloaded or otherwise telling you to "delay sending ...
2
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1answer
828 views

Zimbra MTA settings

Hi have some questions for Zimbra v8.0.6GA. Under Configure -> MTA -> Network, I'm seeing a few settings and am not very clear what to do with them. Web mail MTA Host name Is this for delivering ...
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1answer
430 views

How to let Zimbra accept incoming mail only from some MXes and authenticated users?

I have a working Zimbra 8.0.6 OSE that is currently accepting mail from the outside to any of its locally defined domains and will also relay every mail from authenticated SMTP users. There are ...
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0answers
41 views

Does MS Exchange support redirecting

A, seemingly, simple question: Does MS Exchange support redirecting as per RFC 2822 section 3.6.6 (Resent-* headers)? Yet, the Internet (at least the parts I searched) doesn't turn up a conclusive ...
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1answer
64 views

Postfix, MSA, Smarthost, and LAN

I've, let's say, 5 servers. They are either public and private or only private (network), they all send e-mails, either system e-mails (local mailbox) or installed application (wiki, issues tracker, ...
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1answer
1k views

Bounce message from gsmtp - weird message path

please consider the following email headers from a message that was returned to the original sender. The multipart bounce message also contains the transcript (clear text + HTML) of the correspondence ...
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1answer
95 views

IIS SMTP Server as MTA

I have domain xyz.com. I'm sending mail using MTA. through Symantec Cloud. My setup is as follows. [Symantec Cloud]<->[MTA]<->[Local Mail domain] all the mail out side the domain(xyz.com) goes ...
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1answer
83 views

running localhost mta vs. php smtp'ing via 3rd party api

so the question is, would it be "better" to run localhost mta (ie. postfix) or "better" to use 3rd party restful api, embedded in the application, to send email? i am curious what people would do ...
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1answer
39 views

What allows a mail server to operate faster or handle more mail? [closed]

I realize that this may be better suited for StackOverflow.com instead, however as I'm not much of a developer, I worry those answers may be way too developer-centric. Although, I would like some ...
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1answer
111 views

Exim failing to send mail to emails within local_domains list

Cannot send mail using the command exim4 -bm undelivered@mydomain.com Looking at the logs after this I see that R=dkimproxy and T=dkimproxy_smtp H=localhost[127.0.0.1]:10027. I have seen the ...
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2answers
112 views

MTA handling of too large emails

If an MTA receives an email that exceeds the message size limit, which bevaviour is preferred? What is the default for common mail servers? Reject the email during the SMTP session. The delivering ...
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101 views

postfixadmin doesn't create table but create database

Already i downloaded and installed postfixadmin ,But for version compatibily, i' forced to install from debian repository. I prevent to wonderful thing, It is installed successfully , creates ...
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1answer
93 views

dovecot and postfix from debian repository

I installed dovecot dovecoot-mysql postfix and postfix-mysql from debian repository 7. I start them with /etc/init.d/postfix start and /etc/init.d/dovecot start but When i use nmap localhost I see ...
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1answer
389 views

IPv6 Postfix can receive emails but cannot send

I installed postfix mta and configure to work with IPv6. I tested sending an email from gmail to my vps and the email has been received but when i want to send an email to gmail i get timeout like ...
1
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1answer
37 views

Sendmail doesn't obey .forward files? [ ~root/.forward ]

I am seeing a strange behavior with sendmail, maybe I am missing something? First, sendmail doesn't understand the local machine's own hostname, despite it being in /etc/mail/local-host-names It ...
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1answer
92 views

How to save addresses from bounced messages in Exim 4?

I need to save all bounces in a database, so I can query it from my application and not mail to any address that bounced more than X times. If I recall correctly, Postfix allows to pipe messages to ...
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2answers
428 views

Postfix piping to php issue: “cannot append message to file: cannot open file: Permission denied”

I am having some issues with setting up piping to a php app (WHMCS). The mail is coming to the server however it is bouncing. The maillog shows:- May 15 12:51:14 hostname postfix/smtpd[2123]: ...
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569 views

Postfix not receiving external mail. Sending mail OK

I am having some issues setting up Postfix to receive mail on Centos. This is a web server that I'm setting up to only pipe mail to a php application so the server hostname is hostname.mydomain.com. ...
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2answers
301 views

Verifying MTA for correct behavior with swaks

I'm looking for some advice, what I should to check at my brand new mail-server for it's correct behavior. /saying behavior, because it is working - just but want be sure than it is working ...
4
votes
1answer
119 views

Simple, forwarding-only MTA?

I have a domain and a server. I’d like to have some e-mail addresses on the domain and I’d like to forward them elsewhere. I’d love to avoid running a full-featured MTA on the server, since they’re ...
2
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2answers
66 views

Deliver mail originating from machine/processes to outside machine

I'm running a Ubuntu 12.04lts server with denyhosts, logwatch, apticron etc daemons which send emails to a user on the machine when something happens. Since I don't use the root account; I aliassed ...
2
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2answers
341 views

Creating a mailbox for sendmail using adduser / mailboxes without system user accounts

I want to create some mailboxes for Sendmail and I am going to do it with the adduser system utility, so every mailbox will be a user in the system. How do I restrict the privileges of these accounts ...
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2answers
573 views

Exim 4.69 denying outbound mail due to syntactically invalid EHLO (bizarre pseudo-MAC FQDN)

Since yesterday (new router, which I suspect is the root cause) a client's been having trouble sending email. Receiving is fine, just the outbound is constantly failing. Tailing Exim's mainlog, this ...
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1answer
315 views

In postfix how can I conditionally enforce check_sender_access

I am servicing 2 virtual domains: domain1.org , domain2.org. I want to enforce the following policy: If a client connects from an IP address in $mynetworks then I want to allow only mails for which ...
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1answer
191 views

Using a local MTA as gateway to Sendgrid

I am setting up an email system using Interspire Email Marketer with 5 user accounts, and each user has their own Sendgrid account. We are trying to build a fast system, so we have a dedicated MySQL ...
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1answer
2k views

How to configure a mail server on Debian Squeeze?

How can I configure a mail server on Debian Squeeze with Postfix or Exim4 without the need to relay on another smtp server? And is it possible to add multiple email addresses for the same user? ...
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1answer
193 views

how to receive emails on linux? [closed]

Is there any small utility to receive emails on linux ? Ideally I would need to point mx records on my server and through just a command read all the emails received. I don't need pop3, imap, any user ...
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1answer
21 views

how to run postfix by hand

I compiled postfix 2.9.5 with mysql backend.You know postfix daemons are ran with postfix, So i don't know main postfix daemon to run by hand. What's main daemon ?
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1answer
346 views

Mail rejected if it is a reply to previous mail

I have the problem that a server is rejecting emails from my mail server if they are replies to previous mails. If a new mail is sent it can be delivered. Either I receive this error message host ...
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3answers
235 views

Do I need to setup an SMTP MTA for a contact us form on a VPS?

I'm about to setup a Linode running a Centos server with a rails apps. The rails app has a contact us form. That justs send enquirys to the site owner. No other email functionality is needed The site ...