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

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0
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2answers
21 views

SMTP don't work when try to send mail from mail clinet

Mail server works fine when send mail from server, but when I use some mail client it not work. I found this in logs: Jul 12 19:45:04 tvsite postfix/smtpd[3356]: warning: hostname adsl-bb29-l44 does ...
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1answer
37 views

Transaction failed 554

I created mail server by this tutorial http://www.unixmen.com/install-postfix-mail-server-with-dovecot-and-squirrelmail-on-centos-6-4/ I can send emails to myself it works fine, but when I want to ...
0
votes
1answer
645 views

Postfix connects to wrong relay?

I am trying to set up postfix on my ubuntu server in order to send emails via my isp's smtp server. I seem to have missed something because the mail.log tells me: Jan 19 11:23:11 mediaserver ...
1
vote
1answer
644 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 < ...
0
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1answer
1k views

554 5.7.1 <mail_addr>: Relay access denied centos postfix

I have problem in send mail from postfix in centos I have following setup mail server postfix for sending mail but I am getting error. As in the link I tried following commands telnet localhost ...
0
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4answers
141 views
+50

Postfix setup on AWS EC2 using SMTP relay

On ec2 instance, the IP is dynamic, and if I want to use third party SMTP gateway such as sendgrid, what is the suggested values of the following fields? myorigin myhostname mydestination Assume ...
-1
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0answers
22 views

OpenSMTPD does not deliver mails to MX without TLS

My OpenSMTPD trys to deliver a mail, which i sent locally from the system. But it stops transmitting when tls is not available on the target mx. Jul 4 12:44:50 troll smtpd[4229]: smtp-out: ...
0
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2answers
157 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. ...
1
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2answers
1k 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 ...
4
votes
3answers
84 views

How to limit amount of email sent by postfix to certain domains and control it by using mail header?

Goal I'm looking for a solution to limit rate of e-mails sent to specific e-mail operator (several Top-Level domains, all of them I know) on hourly basis. I also need some way to control the rate on ...
2
votes
1answer
80 views

5.7.1 SMTP error when running stored proc using DB Mail in SQL Server 2012

I am getting an error in SQL Server 2012 Database Mail when executing a stored proc to send an email from a specified address to a specified address using Office 365 as the SMTP server. The mail ...
2
votes
2answers
5k views

Exchange Connector Won't Send to External Domains

I'm a developer trying to get my .Net application to send emails out through our Exchange server. I'm not an Exchange expert so I'll qualify that up front!! We've set up a receive Connector in ...
0
votes
1answer
958 views

DKIM on postfix relay server

I have a postfix/amavis relay server, with the domain name mail.example.com. It will be a relay for dozens of VPS's, which will have domains like hostname.example.net. So i have actually two ...
1
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3answers
3k views

exim4 to relay emails

I have exim4 installed on a Linux box. The basics work fine and I can send email from that machine without any problem to whatever email address. I also have a printer/scanner which is capable to ...
1
vote
1answer
61 views

Postfix After-Queue Content Filter, advanced filter not working

I followed the instructions in the postfix website on how to setup a content filter, I got the simple example up and running fairly quick, but after long hours of struggle I couldnt get the advanced ...
2
votes
1answer
57 views

Postfix multiple checks

I want to achieve the following with Postfix: Run all emails through a black list Allow any clients sending to a list of domains Allow some clients sending to any domain This is what I have: ...
1
vote
0answers
47 views

When does Postfix not perform lookups in virtual_alias_maps?

I'm having a real pickle of a problem: I have a Postfix 2.6.6 / CentOS 6 server that's set up to forward mail from specific aliases to specific destinations. This is done through a mysql ...
1
vote
1answer
39 views

Exchange 2010: Send emails via STMP with custom From address to outside the domain

The requirement(s): (1) Connect to Exchange via STMP and (2) basic authentication and send emails with a (3) custom From address to (4) recipients outside the domain. I was able to get (1) - (3) ...
0
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0answers
81 views

postfix: connection refused on relay, but telnet works

I'm trying to build a postfix relay for two domains, running in a docker container, and should not deliver any mail locally. One of the backend postfix servers is mail.example.net. I can connect to ...
1
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1answer
31 views

Postfix Relay Based on Recepient

What is the best practice when one has to implement this sort of ruleset in postfix? Email sent to a@example.com, b@example.com, etc ought to be relayed to smtp.a.example.com. Email sent to ...
0
votes
1answer
30 views

How do I setup a Hub Transport Relay Connector in Microsoft Exchange 2003?

Preface I am employed by a software company and part of our program uses an Exchange server to relay email notifications. The program works as an SMTP client and must be able to send email to ...
0
votes
1answer
78 views

cPanel Change SMTP send port [closed]

Our ISP blocks outbound port 25 (annoying) and we are currently paying for a relay service. One of our clients on the server is running a high traffic website and pretty much everyone who goes on the ...
0
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1answer
267 views

Set up Exim to authenticate users and then relay SMTP mail via smarthost using different auth

I am attempting to use Exim to function as an SMTP server which relays mail as a smarthost to our Mandrill service. (The point of this would be using Exim to authenticate our users for IMAP mail and ...
-1
votes
1answer
32 views

How is postfix relay configured by default on OSX?

On OSX, I don't need to configure postfix at all, I just sudo postfix start and it all works. In the log files, I see Apr 23 14:04:46 orcrist.local postfix/smtp[19506]: 9211B2E4B96C: ...
17
votes
5answers
142k views

How to correct Postfix' 'Relay Access Denied'?

This morning, in order to correct a problem with a name mismatch in the security certificate, I followed the recommended steps from How to fix mail server SSL?, but now, when attempting to send an ...
0
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1answer
44 views

Postfix on two servers. Can I route all mail though just one of them?

I have at least two web servers which utilise Postfix to send mail from web applications. One is what I call the 'master' which will remain static and the other is what I call the 'slave', which is ...
0
votes
1answer
75 views

Using IIS smtp for incoming and outgoing and use hMailserver for mail accounts

I have installed hMailServer in one machine and IIS STMP in another machine. Even though hMailSever itself is a SMTP server. I can't avoid this because the IIS SMTP server has some hooks which which ...
-1
votes
1answer
60 views

Linux 25 port routing (tunneling/forwarding)

I have: 1) Centos server 1 with postfic/dovecot mail servers IP1 45.45.45.45 (DNS: host1.com.ua) server 1 cannot make outgoing request to 25 port because Internet Service Provider block it! ...
0
votes
2answers
1k 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 ...
2
votes
3answers
2k views

Ubuntu Postfix Gmail SMTP Relay Not Working

I currently have postfix set up to relay messages from my websites through gmail, and up until recently it was working perfectly. However, within the last week or so (not really sure when) I started ...
0
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0answers
2k views

554 Relay access denied

I set up a mailserver yesterday according to this tutorial: http://wiki.hetzner.de/index.php/DebianMailserver3 (tutorial is in german). Sending emails is working fine, recieving emails from other ...
1
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4answers
14k views

Exchange bouncing email sent by Outlook

We are trying to move users off Exchange 2007. Following various guides online, we've changed our Accepted Domain to be "internal relay" and created a "Send connector" to relay unhandled email for our ...
0
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1answer
120 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 ...
2
votes
1answer
178 views

postfix transport relay access denied

When message arrives from other mail server (yahoo/gmail) on my postfix server it gets denied and not being transported using the transport on my configuration. Been checking whole day can't find ...
1
vote
1answer
27 views

What is the correct way to get an NDR to be sent when a bounce back occurs?

I have a user who developed a WebApp that sends SMTP messages. Users are able to reply to the message using a MUA (outlook, whatever) but there is no NDR if the user doesn't exist. I suspect that ...
1
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0answers
94 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 . # ...
0
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0answers
93 views

Handing E-mail Bounce Back in IIS, Setting up SMTP

Our servers send e-mails from @example.com to customers, clients, etc. We use Google Apps for our domain to send and receive additional e-mails from @example.com. Now, we're trying to handle e-mails ...
1
vote
2answers
78 views

Allow outgoing mail without authentication in MS Exchange

We have a legacy application that needs to send notification email to users using SMTP. It runs on a dedicated server with static IP. It has configuration for SMTP USer and SMTP Server IP, but no ...
0
votes
2answers
2k views

Virtual SMTP Server not relaying mail

In our LAN, we have a development box with IIS 7 that has an SMTP Virtual Server installed. All development applications send outgoing mail to this virtual SMTP server, and it in turn relays the mail ...
2
votes
1answer
53 views

SMTP routing cases: same @domain as sender and different @domain

I would like to know what is the difference between sending an email to the same @domain as the sender and sending to a different domain. I cant really find a detailed explanation on the web. From ...
0
votes
0answers
30 views

Issue with Russian Characters using IIS6 SMTP Relay

We have an issue where we have an issue with Russian Characters in the body of emails when using IIS6 SMTP Relay on Windows Server 2008 R2. The relay points to an email provider. The characters ...
1
vote
1answer
56 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 ...
0
votes
2answers
958 views

Postfix: multiple relayhost for 2 internet lines?

Following setup is going on: Firewall with 2 internet lines. Postfix is running as MTA. I have 2 ip's on the lan: 192.168.2.254 192.168.2.252 I would like to create the following situation: ...
1
vote
1answer
179 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 ...
0
votes
1answer
192 views

Capture virtual vagrant server smtp on my actual computer

I'm running a number of virtual servers using vagrant on my computer. This is working well. I have installed Postfix to send SMTP inside these virtual servers. But what I want to do is have Postfix ...
0
votes
1answer
67 views

Having a local SMTP server to relay emails to my website's mail server

I'm working in a small company. We send our emails through company's mail server which is located (along with company's website) on a shared web host. Once in a while our Internet connection is down ...
3
votes
2answers
84 views

SMTP: Which IP should I monitor?

I use a relay server to deliver external mails. I use relay server's IP in SPF record. But I'm not sure about blacklist monitoring/checking. Should I check main server's IP or relay's IP?
0
votes
1answer
68 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 ...
1
vote
2answers
1k views

postfix and iRedMail- Relaying Denied

I am trying to setup iRedMail and am way over my head here. I have installed it, and can send emails internally, but not externally. When I send an email from outside, I get the following return ...
0
votes
0answers
43 views

Rely Access Denied From Gmail To Postfix

I setup Postfix/Devocot on my server. Every thing is going well. Email is perfectly send from postfix to gmail or other mail servers but when I test the email from gmail to my server gmail through and ...