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.

learn more… | top users | synonyms

1
vote
0answers
18 views

Use Google Apps and Transactional MTA, saving sent emails

I've been researching for the following problem I have and I cannot find a clear solution: The company I work for needs to send around 200-300 billing emails out to customers 2 or 3 times a week. ...
0
votes
1answer
117 views

Zimbra doesn't send mail via smtp relay anmore

our Zimbra-Server isn't working for outgoing external mail since yesterday. Friday I installed some updates (for shell shock and Kernel updates), restarted and it worked fine. But since yesterday ...
0
votes
1answer
35 views

Sendmail's MTA, MDA and SMTP 550 User Unknown forwarded to postmaster

I have two boxes running sendmail and configured as: MTA accepting connections from the outside world (mta.xyz.com) MDA accepting connections from internal network and storing them in user mailboxes ...
0
votes
1answer
76 views

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 ...
0
votes
2answers
64 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 ...
0
votes
1answer
230 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 ...
0
votes
1answer
59 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 ...
0
votes
1answer
57 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 = ...
1
vote
1answer
360 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 ...
-2
votes
1answer
656 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 ...
-3
votes
2answers
742 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 ...
0
votes
1answer
85 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 ...
3
votes
2answers
1k 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 ...
1
vote
2answers
1k 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 ...
0
votes
1answer
305 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 ...
1
vote
3answers
1k 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 ...
0
votes
0answers
54 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 ...
2
votes
3answers
1k 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 ...
2
votes
1answer
85 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
votes
1answer
2k 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 ...
0
votes
1answer
659 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 ...
1
vote
0answers
43 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 ...
0
votes
1answer
70 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, ...
0
votes
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 ...
0
votes
1answer
113 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 ...
1
vote
1answer
94 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 ...
1
vote
1answer
40 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 ...
0
votes
1answer
141 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 ...
2
votes
2answers
125 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 ...
-1
votes
1answer
98 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 ...
1
vote
1answer
442 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
vote
1answer
62 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 ...
-1
votes
1answer
94 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 ...
0
votes
2answers
486 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]: ...
0
votes
0answers
713 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. ...
3
votes
2answers
372 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
139 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
votes
2answers
76 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
votes
2answers
421 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 ...
1
vote
2answers
654 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 ...
1
vote
1answer
384 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 ...
1
vote
1answer
209 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 ...
-1
votes
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? ...
-1
votes
1answer
256 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 ...
-3
votes
1answer
23 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 ?
1
vote
1answer
404 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 ...
0
votes
3answers
251 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 ...
0
votes
2answers
154 views

unable to send mail through the from address in gmail

I am trying to send mail using postfix, I have set up all the things, the mail is going, I have set up the email using my domain i.e. xyz@domain.com. When When I am using the following code ehlo xyz ...
3
votes
5answers
2k views

How do I set up postfix to store e-mail in a file instead of relaying it?

I want to run a staging copy of a production server on a local environment. The system runs a PHP application, which sends e-mail to customers in various scenarios and I want to make sure no e-mail is ...
0
votes
1answer
181 views

Route all postfix mail through noreply@

I want postfix to send out all email via noreply@mydomain.com My main.cf looks like sender_canonical_maps = regexp:/etc/postfix/canonical local_header_rewrite_clients = static:all and my canonical ...