SMTP is the Simple Mail Transfer Protocol, the most recent standard of which is defined in RFC 5321. It's the Internet standard for sending and receiving email.

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How do I track whether a email was successful among thousands (IIS 6, .NET 3.5)

I want to be able to tell if an email sent to a user is successful or not. I've tried looking at the SMTP logs and there appears to be no way to link server requests with server responses. So if I ...
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2answers
863 views

How to set PTR record on Windows Server 2008?

I'm having some problems sending out emails from my SMTP Server... apparently I need to setup the PTR record for Reverse-DNS Lookups. I have no clue how to do this. Some instructions point ask to ...
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2answers
428 views

means to verify whether mails sent using a java application is delivered to the destination by the SMTP mail server

I am trying to send mails in large numbers, say 1000, using a java test application and a mail server, but though the application confirms that it has sent all the 1000 mails without any exceptions, I ...
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1answer
268 views

Best Email Host or Solution For Large Volume of Automated Emails

I run a service which send's people alerts via email. I am launching a new version and switched over a bunch of stuff to GoDaddy, but it looks like there is a limit of 250 SMTP relays per day so this ...
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2answers
385 views

Suggestions on changing an internet smtp server's ip address

We are moving one of our smtp servers from one hosting provider (A) to another hosting provider (B). Because of this move, the IP address of the server will have to change. Our plan is to do the ...
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4answers
581 views

Checking an Windows 2003 SMTP server from the command line?

I have a simple SMTP server installed on an IIS instance on a Win2k3 server. I want to figure out why my messages have stopped being relayed, but apparently I have to install Exchange System Manager ...
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3answers
297 views

Send Mail From Another Server

I have a server that has been sending email for the past 2 years, using PHP's mail() function. It runs Windows Server 2003. I have another server, on the same local network as it, running Ubuntu ...
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1answer
717 views

smtp/pop3 server and mx record

I run smtp and pop3 server in local computer. I have domain name and set up MX record for this domain. Please, explain me anybody how smtp server name depend at MX record? And where must i specify the ...
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1answer
1k views

Prevent SPAM by limiting SMTP connections using iptables

We operate a private VPN service which has been recently abused by spammers and we would like to be able to limit the number of SMTP connections per minute/hour to make it ineffective for spammers ...
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2answers
416 views

exchange 2007 with two accepted domains, send mail

in my exchange server 2007 config, i have two accepted domains. my company runs two websites which sells similar items, however they do not want customers to know that websites are related in any way. ...
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1answer
4k views

Exchange 2003 mail non-delivery (NDR), spam activity? events 7002 & 7004

Windows Server 2003 Small Business Server SP2 Exchange Version 6.5 (Build 7638.2: Service Pack 2) This network has been neglected and has been having email problems for years and was on many ...
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3answers
2k views

How do I secure smtp in exchange?

We currently run windows server 2003 with exchange mail, but have been blocked with spamhaus.org even though we don't send out spam mail. My question is, what settings do I need to set with smtp to ...
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1answer
4k views

Exchange 2010 periodically stops responding to SMTP events with error 421 4.4.1 Connection timed out

After some help diagnosing why Exchange 2010 Enterprise stops responding to SMTP events. I can't find a pattern to it. It doesn't appear to be an actual timeout, as the server responds immediately ...
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1answer
386 views

exim4 seem to stop listening

Hey, I have a strange problem with my exim4 configuration. I have a dedicated server running debian for quite a long time now, but I'm not really using it actively recently, so everything just worked ...
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1answer
115 views

Force SMTP relay to use specific server

Is there a way to tell IIS to us another SMTP relay? Something like this? Application(s) sends email SMTP relay on server A. Server A sends email to SMTP realy on server B. Server B send mail to ...
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2answers
1k views

SMTP server (IIS) is running but can't test it with telnet

I have a Windows 2003 web edition server that I can't seem to get the SMTP relay working. BT4 shows port 25 open. When I try use telnet to test it on my desktop I get: Connecting To ...
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1answer
1k views

How to safely send newsletters on VPS (SMTP) w/ non-hosted domain as “From” email?

Greetings, I'm trying to understand the safest way to use SMTP. I'm considering purchasing a second virtual server mainly for email sending, on which I will set up PHPlist (a free open-source ...
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3answers
442 views

Avoiding spam filters on my CentOS 5.5 64bit server?

I run a social network on my web server, with about 15,000 members right now. My administration section let's me Mass Email all my users. Currently it uses the built in PHP mail function. What is the ...
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2answers
263 views

Email Proxy Ideas

I wish to host some managed email servers for some customers. Each customer will have their own email server which will be an all-in-one virtual machine running postfix, dovecot and some webmail ...
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3answers
2k views

Something is spamming from my hMail server - how can I deal with this?

My Windows 2008 server is attempting to send out a lot of spam, I've just discovered, and I'm not sure how to see where the compromise is. For example: has someone hacked an account? Has someone ...
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3answers
1k views

SMTP 25 blocked externally

Not sure how to title this question... We run an Exchange server with around 80 internal users. All outgoing mail is relayed through a smart host (ISP SMTP server), so nothing is actually sent to the ...
2
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1answer
138 views

Different Servers for incoming mails

not sure if what I want is possible so I´d appreciate any pointers. I have full control over the infrastructure (DNS and servers) Currently I receive mails for domain.tld. MX record for domain.tld ...
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3answers
1k views

The server response was: sorry, relaying denied from your location - Windows Server 2008

I am finding a problem sending email from my .NET application. Server Error in '/' Application. Mailbox name not allowed. The server response was: sorry, relaying denied from your location [X.X.X.X] ...
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3answers
101 views

Is it possible to cause email to my domain to be handled by gmail?

[This is a very narrow question, and I don't think it is covered in similar sounding questions] I want to configure my server's DNS so that when someone sends email to me@myserver.com it is actually ...
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2answers
119 views

Exchange 2003 inbound routing issue

Just recently we started experiencing inbound routing issues. Email adddressed to user@domain.com is intermittantly translated to user@www.domain.com. This is happening for several users and, as ...
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3answers
578 views

My server won't relay emails from Outlook but I can receive

When I sent an email from Outlook to my server, I get a "Relay Access Denied" error. I don't know what settings to change in the mailer. I can receive mails fine. Outlook is marked for SMTP not ...
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1answer
315 views

Can powershell be used to install SMTP service for IIS 6 and configure the options

I want to install the SMTP service for IIS 6 on windows server 2003. The GUI process is explained here on technet. Then I want to configure the properties (e.g. first retry interval) and create new ...
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2answers
9k views

Correct use of SMTP “Sender” header?

Our web application sends email messages to people when someone posts new content. Both sender and recipient have opted into receiving email messages from our application. When preparing such a ...
0
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1answer
210 views

Dual SMTP Server issue with Unicast Network Load Balancing

Using two servers with NLB, each box contains IIS and a mail server. Server1 is the primary Server2 runs the backup mail server The problem is the web app sends email to ourselves. When mail is sent ...
3
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1answer
829 views

DNSBL listed at zen.spamhaus.org - cant get outgoing mail working? Am I interpreting the response correctly?

I have problem with a mailserver and there is something I kind of not understand! I can connect, authenticate, specify the sender address - but when specifying the reciever i get a error 550 which ...
0
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1answer
104 views

Do two portforward rules translate to “and”?

I just set up an Exchange server to replace my DeskNow mail server. I want to start testing my internet mail exchange of my Exchange server. I can only set the MX records on my DNS up to my one ...
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2answers
329 views

Capture Outgoing Email to One Mailbox or Account on Linux

I am looking to see if anything exists that would allow us to capture all outgoing email on a machine -- for example, in a staging environment -- and drop it in a single place, which ideally would be ...
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3answers
2k views

SMTP redirecting to other port than 25

How can you redirect your smtp traffic to another port than 25? My ISP blocks incoming traffic to port 25. I've been using ZoneEdit.com for this purpose for years (incoming mail traffic goes to ...
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1answer
269 views

Preprocess outgoing email bodies with a linux smtp server/proxy?

I have an smtp server running locally on my server, and need to edit the contents of email bodies before they actually get sent out. I have tried using EmailRelay to proxy my smtp server with the ...
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4answers
2k views

how to protect telnet access to smtp port 25?

Please consider the following: 192-168-1-106:~ michael$ telnet <remote_server_ip> 25 Trying <remote_server_ip>... Connected to li*****.linode.com. Escape character is '^]'. 220 ...
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3answers
600 views

Paid SMTP service to decrease probablity being detected as spam?

Is it worth using paid SMTP service to decrease probability being detected as spam? What paid smtp services (except smtp.com) you know? PS: Of course, I'm not going to send spam. PPS: Probably this ...
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3answers
235 views

Emails Generated From Our Linux Server are Blocked By Our Exchange Server (That Has Barracuda)

We have our company website hosted on a Linux machine. It is sending mail via postfix. The emails are working and being sent to all email clients like Gmail. However, we are not receiving the ...
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1answer
701 views

DKIMPROXY signing wrong domain

Just.... wont sign a thing... The dkimproxy_out.conf: # specify what address/port DKIMproxy should listen on listen 127.0.0.1:10028 # specify what address/port DKIMproxy forwards mail to relay ...
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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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1answer
97 views

Connecting to my SMTP server

I have a few questions, I just installed SMTP on my Ubuntu server, and I want to know how to connect to it from a different machine... I'm not really clear. I tried: telnet my.servers.ip.address 25 ...
0
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1answer
729 views

Sendmail in Nexenta core 3.0.1

I'm trying to setup sendmail in Nexenta core 3.0.1 (Solaris based OS). All I want is to be able to send emails from that host - like notifications about failures, cron jobs output etc. Initially ...
0
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2answers
930 views

hMailServer SMTP error

I have hMailServer installed. I can send emails and everything is ok. I have only one problem. When i try to send an email to gmail.com i recive an "undelivered" email and this link: ...
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1answer
2k views

Cannot install SMTP Service - Insert disk labeled “Service Pack 2 CD-ROM”

We are running Windows Server 2003 R2 x64. I am trying to install the smtp service. I tried the solution posted here, but When I pulled the files over, only the first missing dll was found. Others, ...
0
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3answers
665 views

Forcing all Exchange-to-Exchange (2010) e-mail to go via an outside SMTP gateway

We want to force all our e-mail to go via an SMTP server for virus scanning, spam scanning and some tags that we use internally. Is this possible? We configured Exchange's smarthost property and that ...
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2answers
11k views

How to unblacklist an IP at Google?

I own a small business with two servers for webhosting. When setting up the primary (CentOS 5.5 + WHM, secondary is WHM DNS Only) server I kinda messed up the firewall, so the hackers could send stuff ...
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3answers
138 views

SMTP Deferred because of Reverse Lookup Errors

When sending emails I get about 5 out of 3000 emails that are status deferred because the PTR look failed according to the SMTP response of the receiving server. My PTR records are in order and match ...
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2answers
130 views

postfix remote mx 0.0.0.0 looping

Does anyone know how to make postfix avoid getting into an endless loop of errors when a remote mx server resolves to 0.0.0.0 ? The problem sounds exactly like that described here: mail loops back to ...
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1answer
361 views

exim4 issue with MX records

I have a Debian machine running Exim4. However, when checking the Exim log, I noticed this issue when mailing my own domain: 2010-12-14 09:20:01 1PSQ77-0005mG-9w ** root@domain.com: all relevant MX ...
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1answer
1k views

How to hide the client IP sender and show only the SMTP server IP?

We got a backend server in a specific ISP with a reverse proxy frontend in a different ISP. In order to send mail we use the backend server which connects to a frontend sendmail SMTP server. The ...
0
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1answer
165 views

is there any program that can send emails from localhost

i just have a laptop with an internet connection, but i keep changing the internet provider. i want to be able to send mails from my laptop to real addresses. i dont want to use smtp. can i configure ...