Simple Mail Transfer Protocol (SMTP) relaying (transferring between computers).

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454 views

Postfix smtp relay with mysql autentification. How to?

I have a Centos 5 mail server setup with postfix and dovecot (+ postfix admin). Dovecot autentification is trough mysql database (which is updated with postfix admin). Passwords are stored in md5. ...
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3answers
1k views

Postfix: Relay access denied

When I telnet to my server thats running postfix and try to send an email: MAIL FROM:<someuser@mydomain.com> #=> 250 2.1.0 Ok RCPT TO:<me@gmail.com> #=> 554 5.7.1 ...
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2answers
266 views

SMTP server to be used for Email Marketing Service

I am trying to build a email marketing service company. I am a .net programmer and I have played around trying to build a custom SMTP server but a lot of problems came up when domain keys into play. ...
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1answer
1k views

Problems using hmailserver as outgoing SMTP server

I have hmailserver set up and accepting email for projectattack.co.uk domain - I can connect to the server through port 110 pop3 using both gmail and mail.app on osx I have a cname pointing smtp to ...
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1answer
145 views

SMTP blacklisted email response code

I am implementing a blacklist filter for a SMTP relay, which allows the user to define rules based on sender email, receiver email, sender ip or a combination of these. What SMTP status code should it ...
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2answers
518 views

“Relay access denied” overflowing postfix mail.log

My mail.log is overflowing with random spammers attempting to send spam through my server. Is this typical or have I misconfigured something? Is there a way to ban an IP after several attempts of ...
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1answer
820 views

Exim4 Smart Host Relay

I am running Exim 4.71. I want to: Route all email from A.com through mail.A.com Route all email from [B-E].com through mail.B.com Send all other email directly. Here is the configuration I have ...
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512 views

qmail questions - whitelisting and relays

My new server runs qmail, which I've never used before. There is no inbound mail on the server (all the clients have mail hosted elsewhere, but some systems on the server send mail. I'm about to move ...
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101 views

Dedicated Server emails ending up in Junk

I have a dedicated server that works fine. Recently I added a new domain with a new dedicated IP address. The emails from the webserver gets sent out from the primary IP address which is different ...
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2answers
2k views

sendmail can not relay from itself

I am running 3 centos 5.2 servers and I have configured the server for forward all messages to root to be emailed to me via .forward rule. This is working fine on two of the servers but not on the ...
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2answers
407 views

Relay SMTP server

I am not a server administrator, but know my way around *nix and shell Right now my web server is set up to relay to an e-mail address that does not exists. How can I change it. Thanks for any ...
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28 views

Postfix transport relay based on result of MX lookup

You can tell postfix to relay all mails for *@gmail.com via your account on smtp.google.com using transport maps: # /etc/postfix/transport gmail.com smtp:[smtp.gmail.com]:587 . # ...
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40 views

SMTP as SmartHost for SendMail

My general task is following: We have workable application that sends mails to the users (that are registered in this application on some actions); Mails are sending using sendmail tool; In order to ...
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1answer
106 views

Dual delivery Google Apps and Postifx (server reject mail from my domain on google)

This is the scenario: I have a server with Postfix and some domains, and now, one of this domains want to use Gmail Google Apps only in a couple of accounts. The end-user configure the domain with ...
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0answers
97 views

multiple login credentials for same relayhost

i struggle with my postfix config. i want to use the same relayhost for my two domains, but i have different credentials on the relayhost. is there a way to tell postfix to use two different login ...
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76 views

Postfix sometimes ignore sasl_passwd

I have a server (server1) configured to use a relayhost (server2), with a specific username and password. server2 is another of my servers. server1 configuration: /etc/postfix/main.cf: relayhost = ...
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247 views

What are the values of Exchange's XSHADOW and XQDISCARD commands?

Shadow redundancy is an Exchange-specific feature (beginning with Exchange 2010) that provides a measure of fault tolerance when relaying email messages with SMTP. The sending Exchange server sends ...
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141 views

Postfix: Modify sender address based on recipient

We have a Postfix server that receives mail from our application servers. Senders are in the form user@host.fqdn (where host.fqdn can vary, depending on source server) and recipients can be internal ...
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1answer
121 views

Exchange 2007 Server - Sender unable to send one recipient in the domain

I have a mail server that serves multiple domains. I have 2 users that use a specific domain. User A does not experience any issues when sending and receiving mail. User B can send emails fine and ...
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1answer
225 views

Postfix mail gateway/relay for limited domains

I have a number of servers at a hosting space. What is the best way or is it possible to run a relay on one of the system to send all emails to alerts@myowndomain.com to our email hosting service ? ...
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642 views

530 5.7.1 Client was not authenticated Exchange 2010 for some computers within mask

We have a classic problem with Client not Authenticated but with a specific twist: We have an Exchange 2010 cluster, let's say EX01 and EX02, the connection is always to smtp.acme.com, then it is ...
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1answer
560 views

Mailx not sending emails

Using CentOS 5.6 and trying to send (only) emails to remote boxes. I am on a CentOS client box and trying to send email to my road-runner email account. mailx -s "Some Subject" me@tx.rr.com < ...
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134 views

IIS 6.0 and Virtual SMTP relay ~ some messages are bouncing

I will give a quick overview and then the details. I have a Exchange 2003 environment that I have been asked to slap on a disclaimer on all outgoing mail. So I have setup a Windows 2003 server and ...
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1answer
591 views

Sendmail: Have to add NAT IP to access list to relay, why?

I have sendmail set up with smarthost to Google Apps (using AuthInfo in /etc/mail/access for authentication). I noticed last night that e-mail was not going through. I send an e-mail like so: echo ...
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1answer
703 views

How to get rid of messages addressed to not existing subdomains?

I have small problem with my sendmail server and need your little help :-) My situation is as follow: User mailboxes are placed on MS exchanege server and all mail to and from outside world are ...
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1answer
454 views

Postfix relaying : email to multiple addresses with one relay

I have postfix installed on an ubuntu server so my website can hand it email to relay onto sendgrid.net. Before I installed postfix I setup swiftmailer to send the email directly to sendgrid.net, and ...
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271 views

Can anyone explain what are the inbound and outbound relay in the mail server?

Can anyone explain what are the inbound and outbound relay in the mail server?
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319 views

Configure Exchange 2007 to Route Messages for Shared Address Space

I have a strange problem with Exchange 2007, the company has two separate offices, one with SBS 2008/Exchange 2007 installed, the other does not have a server and uses our pop3 service from our web ...
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2answers
823 views

Running/debugging SMTP Event Sinks under windows 2008

I have an SMTP Event Sink to process incoming SMTP email messages to perform special processing. Under IIS 6/SMTP, this event sink runs as expected. Under IIS 7/SMTP, it does not appear to run, even ...
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299 views

Block SMTP Relay Commands with Windows Server 2003

I use the POP3 Service that comes with Windows 2003 and that requires that I allow SMTP Anonymous Authentication. Although I've turned off relaying, I would like to do is reject any commands that ...
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2answers
914 views

Postfix relay host connection fails: timed out while receiving initial server greeting

I have an Elastix server box that I want to send email notifications of voice mails from. I'd like to send them through our company email (hosted by shared web host provider Bluehost). I have followed ...
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3answers
871 views

Allowing Sharepoint to relay email through Exchange

I have written a Sharepoint 2007 web part that sends a field from a form to a specified email address. I have got the form working as I require, but at present it can only send to internal email ...
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438 views

A flexible SMTP server that's open source or free

We currently have our own in-house email marketing software for our newsletters, and were using SQL server's SMTP agent to send emails through our local SMTP server (IIS) and then onto our ISP's SMTP ...
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261 views

How does “sendmail” send mails to any domain name?

I noticed that one of our servers (running Ubuntu) can send mails to any domain (yahoo.com ,gmail.com) using simple "sendmail" command. But I cannot figure out how to configure similar setup in a new ...
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3answers
357 views

Is there a way to set up an SMTP relay that allows users of a web app to have the web app send emails with their own email address as senders?

the web service sends out emails on behalf of the users to their customers. So john@domainA.com uses webservice and webservice sends emails . The emails should be appearing as coming from ...
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132 views

SMTP / HELO and RBL black listing

We've been having many issues with our external IP address being put on RBL's and blacklisted. We are using a 3rd party, hosted SMTP e-mail and we have two locations using it. Our TLD is ABC.com. ...
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1answer
1k views

POSTFIX bouncing when destination is my domain

I am using provider mail hosting to send emails. On my Webserver I also have Postfix running and configured. Here is my main.cf smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no ...
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3answers
6k views

How can email be resent that has been delivered to the Badmail folder in IIS?

We have IIS setup as an SMTP relay. A relay security error caused the outbound emails to be delivered to the badmail folder for the IIS SMTP Service. Is there any standard method for attempting to ...
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1answer
267 views

Open Relay for internal IPs

How do I enable SBS 2008 and exchange to send mail via SMTP without authentication? I have a handful of network scanners that don't have anyway of configuring SMTP authentication. So I want the ...
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3answers
506 views

What are the pros and cons of using Microsoft's own SMTP server versus a third party one?

I need to setup a SMTP relay for some web applications that need to send email to its users. I've used hMailServer for that task previously, but I'm thinking of switching to IIS SMTP Virtual Server. ...
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7answers
5k views

Postfix open relay

Greetings, Google says that I'm originating too many emails from my IP. Since I NEVER uses this smtp to originate emails, I suspect my postfix is somewhat misconfigured, so that I have an open relay ...
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1answer
48 views

Outgoing SMTP Blocked

I have an Exchange 2013 Server. My ISP blocks port 25 and it doesn't seem to be working on any other port either. I am currently using DynDNS' hosted SMTP service - but it only lets me send a few ...
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2answers
265 views

Email not being relayed from EC2 Amazon Linux Instance

I'm trying to send email from my EC2 instance. Regardless of the target email address the SMTP service logs show that the email is sent but it never turns up on the remote server. I've done a ...
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2answers
832 views

Prepend X-header to all relayed messages in Postfix

I've got several production servers running a LAMP stack. They each have a local Postfix server catching any mail from the system and from PHP, and relaying it via a smarthost (the SendGrid SMTP ...
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1answer
303 views

Understanding sendmail logs

So yesterday we found out that one of our old pop servers had been hacked and was sending out spam. We promptly took care of the situation and it would seem that it's all taken care of. I've been ...
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1answer
4k views

Allow certain IP(s) to send almost any e-mail through Exchange 2010

We recently migrated form Exchange 2000 (yes I know...) to Exchange 2010 and went through the horror of configuring it. First of all we don't use ForeFront, sadly(?) we can't. Before I ask my ...
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35 views

smtp relay attack on our mail server (not an open relay server)

Help, We put our Exchange Server (10.0.0.125) behind a SMTP Proxy server (Xeams if you have heard of it), however recently our client complaints we replies their email too late - and we found ...
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427 views

SMTP -> ERROR: RCPT not accepted from server: 554 5.7.1 : Client host rejected: Access denied

I am trying to send mail through phpmailer with smtp.i am using the host which i am using on my outlook with same username and password.I am getting an error .can anyone help me how to fix this. My ...
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2answers
73 views

Same domain SMTP unauthenticated message relay [closed]

While I was doing some testing on an SMTP server I was able to successfully send mail from knownid@myserver.com to knownid@myserver.com through telnet without any authentication. From a risk ...
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1answer
96 views

Postfix - RBL check behind relayhost

We are running a mail server which is responsible for a sub-domain (say, dom1.example.com). All the mails sent from Internet are received through our relayhost (mail server responsible for ...