1
vote
1answer
26 views

“4.7.0 Timeout waiting for client input” error Exchange 2013

I am having trouble sending mail from several servers with the following error when trying from command line. -> (telnet 25, mail to rcpt to data etc.) 250 2.1.5 Recipient OK data 354 Start mail ...
-1
votes
1answer
65 views

How to setup intermediate SMTP mail server / relay to filter outgoing emails

I want to block all outgoing emails except to few whitelisted domains. what are the best ways to go about it? Can I put an intermediate Intranet server which will do filtering based on whitelist and ...
0
votes
1answer
27 views

Postfix relaying to local instead of relayhost

I am trying a simple postfix relay of emails via an SMTP server. But I see from the logs that the mails are relayed to local and not to the relay host. The main.cf configurations are below, ...
0
votes
2answers
132 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 ...
0
votes
4answers
336 views

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 ...
4
votes
3answers
133 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 ...
1
vote
1answer
152 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
73 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: ...
2
votes
1answer
153 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 ...
1
vote
1answer
59 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
votes
1answer
123 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
votes
1answer
139 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 ...
0
votes
1answer
176 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 ...
1
vote
1answer
30 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 ...
0
votes
0answers
116 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 ...
2
votes
1answer
61 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
38 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 ...
0
votes
1answer
261 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 ...
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
2answers
2k 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 ...
0
votes
1answer
83 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 ...
0
votes
0answers
31 views

Mail server in the middle responsible for translating from one domain to another

The title is a little confusing. We have an internal mail server that can be used to send mail. This internal mail server is only accessible from within our firewall unless we use the mail server's ...
1
vote
2answers
2k 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
votes
1answer
56 views

Configure IIS SMTP server to forward to more than one address

I have the SMTP service installed on Server 2008 R2. Under Domains, if I go to properties, under Route Domain, I have the option to forward all mail to smart host and I currently have one address ...
0
votes
2answers
129 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 ...
0
votes
2answers
551 views

Can I send email unauthenticated to an internal SMTP server which then relays onto authenticated SMTP?

I have a back-end system which only supports sending email to an *UN*authenticated SMTP server, however, ultimately it needs to go via an authenticated SMTP server on the public internet. My idea was ...
0
votes
0answers
65 views

Postfix dosen't forward to Gmail Yahoo Hotmail

I have a problem with my Postfix 2.8.4 (Cent OS 6 with Plesk 11.0) If i sent an email to one of these providers, it will be delivered ok. If I setup my email to forward all emails to one of these ...
2
votes
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 ...
1
vote
2answers
332 views

Postfix - unable to access externally

So I can't seem to access smtp from externally. When using a desktop email client (eM client and thunderbird both fail) I can't get it to hit the server at all. (eM client is trying to hit: ...
0
votes
1answer
75 views

Hook into sendmail

I have an app on a server that sends mail via the local system's 'sendmail'. I want to write a program that takes the payload of the message, modifies it, and then sends it on to the original ...
0
votes
1answer
58 views

What postfix does if it is unable to deliver a message?

If I send a message from postfixA -> smartHost postfixB -> smartHost postfixC -> exchange and only postfixC does MX lookup and it is unable to deliver the message no matter if it is a hard ...
0
votes
0answers
112 views

SMTP relay anti-relaying and LIMIT/QUOTA

I need some help to face this problem. I have 2 LAN connected to the same router. My first LAN is the office LAN and left on the internet with one public IP address. My second LAN is the datacenter ...
0
votes
1answer
46 views

Will Email sent from a 3rd Party SMTP service get classified spam?

I have a web application that I developed. I was originally using the Google Apps smtp servers for the outbound emails generated from the application for user notifications. As use increased Google ...
2
votes
1answer
281 views

SMTP Event Sinks in Windows 2008 R2

We use a 3rd party software to send Bulk Emails. The software does not provide options to add Email addresses in BCC. However, as per Compliance Rules, it is necessary for us to add a BCC address to ...
0
votes
1answer
46 views

Internal SMTP server + Hosted E-mail possibiilty

We currently use a 3rd party hosted e-mail system using SMTP and IMAP. I was curious is there a way to setup an internal SMTP gateway or server that the internal client can connect through to ...
0
votes
2answers
106 views

SMTP server to smtp server forwarding?

we have one smtp server and we want incoming mail should store by smtp and forward two other smtp server is their any solution we dont want email forwarding Ex mail@mail.com to amail@mail.com ...
3
votes
1answer
272 views

What PID is making outbound connections on port 25?

What is the most ready way to log the PID and process name of anything making an outbound connection on port 25? This is on a 2008 x32 server without the windows firewall enabled. I'm ...
0
votes
2answers
165 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. ...
0
votes
1answer
262 views

postfix relayhost 'Recipient is not recognized. Relay access denied'

im trying to get webmin postfix to send emails through my smtp account with another email provider (in this case lavabit.com) im getting the error 'Recipient is not recognized. Relay access ...
0
votes
1answer
723 views

exim is not accepting external connections

Update: It's definitely my ISP blocking port 25. I told Exim to listen on a non-standard port, and then checked from a remote computer to that port, and it went through just fine. So, I guess I have ...
0
votes
1answer
710 views

Google Apps + Mailgun Split Delivery

We currently use Google Apps for receiving emails on our domain. We would like to send all mail to unknown addresses to our Mailgun server for further processing. This seems like a typical "split ...
1
vote
1answer
147 views

IIS SMTP server sending emails multiple times

I am having a problem with the SMTP server on a Windows server 2008 box. Every Thursday morning, the server decides to send the same 2000+ emails to the same person. There is nothing in the code ...
0
votes
1answer
683 views

Telnet to SMTP gets no 220 response unless user is specified

My server is setup to generate outgoing email only (no receiving), and is timing out when attempting to contact smtp.foo.com Essentially the email is generated by a process on myserver.foo.com, sent ...
-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
vote
0answers
372 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 ...
0
votes
0answers
236 views

SMTP relay to Exchange Online - won't work without remote domain smarthosts?

We've got an on-premise SharePoint farm that sends and receives email via an SMTP instance on one of the servers which relays to our on-premise Exchange. We're in the middle of a migration to ...
1
vote
2answers
139 views

Postifx: how can someone send e-mail without authorization with this configuration?

Yesterday I found that 10 thousand e-mail messages were sent through my system using this configuration: http://pastebin.com/bThpH1s8 - main.cf http://pastebin.com/kkxxsstP - master.cf I temporarily ...
1
vote
0answers
172 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 ...
0
votes
1answer
2k 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 ...
1
vote
0answers
761 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 ...