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 to make postfix send email when fail delivery attempt?

i'm setting up postfix as a MX server. Basically it will receive email, do all filterings and route to domain SMTP server. In case of failure when trying to send the email to the destination SMTP, is ...
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1answer
408 views

McAfee Secure Messaging Service / Postini: false positive?

I'm puzzled by this email message that gets quarantined by McAfee Secure Messaging Service (it's based on Postini) for no reason that I can think of. Here are the Postini headers: X-pstn-2strike: ...
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1answer
176 views

Hot/Lukewarm mail server setup

We have two mailservers ("dubone" and "dubdeuce"), one does all the work while the other sits idle. We want to have a setup where if dubone is busy or down, dubdeuce can accept/reject/filter emails ...
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1answer
844 views

SMTP Connections in Lotus domino

Yahoo limits the number of messages that can be sent per SMTP connection to 5. (see. http://help.yahoo.com/l/us/yahoo/mail/postmaster/basics/postmaster-38.html;%5Fylt=AmQ249AWdyWDPc9ZukN6VGkIJHdG) We ...
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3answers
6k views

How do I lock down Exchange 2007 to accept email from a specific range of IP addresses only?

I have implemented a new Exchange 2007 server running on Server 2008 in our domain. We previously used Exchange 2003 running on Server 2003 and I had locked the Default SMTP Connector down so that it ...
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1answer
14k views

Postfix “timed out while sending message body” to “Microsoft ESMTP MAIL Service”

For some reason we cannot send larger email to one of our customers. Small emails are fine, but even a message with a 1MB attachment fails to deliver for several hours - Postfix logs keep filling with ...
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1answer
1k views

Change email domain OS X Server

I'm having trouble setting up the mail service correctly on my os x leopard server. In server admin, under Mail>General the domain is set to "mydomain.net.nz", and my host name ...
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6answers
14k views

How to Setup Ubuntu Mail Server with Google Apps?

I have a domain, let's call it foobar.com. All of the MX records for foobar.com point to Google's mail servers because I am using Google Apps for your domain to manage it. It's great because everyone ...
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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 ...
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1answer
264 views

Sharepoint 2007 Incoming Mail broken

I have been using incoming mail settings on a number of sites within a site collection for the better part of a year, however it broke on Monday and I have not been able to find out why. It is ...
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3answers
608 views

Forwarding all mail to a single dev box on IIS via virtual SMTP

I am trying to set up a development environment for our web server. I would like all emails that are relayed by the server go to a specific mailbox, regardless of who they were sent to. For example, ...
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4answers
4k views

hmailserver - I suspect that a spammer may be using my server

First, I'd like to verify whether or not a spammer is using my server. I've turned logging on -- which logs should I be checking specifically? Just SMTP? Second, I'd like to configure my ...
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4answers
3k views

Sending bounce mail messages customized for employees no longer with the company

Currently we use a hosting company for our Exchange services. We are considering a switch to Google apps, but that is in a pilot program at the present time. Our Exchange provider and Google Apps ...
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4answers
12k views

Easiest way to send a test email from a server, to test settings?

Using Windows (2008) is there an easy command line tool that I can use to send a test email from a server to test the SMTP, user authentication, ports, etc... without writing my own?
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5answers
4k views

IIS 6 SMTP how to test email is sending

My server(Windows Server 2003) is running IIS 6. It does not seem to be sending any emails. How can I go about trying to find the fault?
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1answer
5k views

How to configure IIS SMTP server to relay outgoing messages to another local SMTP server?

I'm using Windows XP on my development machine (IIS 5.1). I installed hmailserver on my machine and now want to configure IIS to relay all outgoing messages to hmailserver, what should I do in IIS to ...
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4answers
4k views

Exchange 2003 - how to route ALL mail (including internal) via an external SMTP gateway? (Or, domain/mail server migration for the masses.)

Short version: Is there a way to have Exchange route all email, including internal AD users that would normally be routed directly, through an external gateway? (SMTP, probably a "Smart Host" in ...
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1answer
961 views

How do I configure SMTP for DB2 9.5?

During install I know the wizard asks for an SMTP server for notification. But I can't find these properties now when we really need it. We're running on Windows Server 2008.
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1answer
126 views

SMail configure listening port/address?

I try to configure my smail-system. I want it to listen only on localhost/127.0.0.1 But when I check my system via nmap myredirectingdomainname.com it shows me the open port 25. Can you help ...
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1answer
71 views

How would I test rblserver?

I'm using few rbl servers, and all of the sudden i see slowness, as soon as I remove all rblservers, it works very fast as it used too, other than removing one by one server is there a way to test rbl ...
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1answer
994 views

Best way to throttle smtp email on Windows Server 2008

I have a server with SMTP set up for my site's outbound email. In order to not get blacklisted I'd like to limit outbound emails to under an arbitrary threshold (let's say 500 per hour). What's the ...
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4answers
12k views

How does a Reverse DNS lookup work with regards to spam filters?

I have heard that most spam filters use a reverse DNS lookup on the originating IP address of the sending SMTP server (or something like that) as part of the verification process. I want to make sure ...
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2answers
2k views

IIS SMTP Service Routing Outbound Mail

Regarding the SMTP service that is including in Microsoft's Internet Information Services (IIS) 6.0. I have it in my mind that the built-in SMTP service is not capable of routing outbound messages, ...
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3answers
1k views

Configure IIS 5.1 for SMTP

I've tried a number of solutions that I found on the internet, but none worked. I can telnet to port 25 and send an email via IIS 5.1 listening on that port, but the email never gets delivered. I see ...
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1answer
2k views

How to turn on SMTP relaying? Getting error: “SMTP Error: The following recipients failed [address]”

Attempting to configure some software on our server to send email via SMTP. When testing it, get this SMTP Error: SMTP Error: The following recipients failed [address]" Based on my research and a ...
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2answers
2k views

How to turn on SMTP relaying? Getting error: “SMTP Error: The following recipients failed [address]” [on hold]

Attempting to configure some software on our server to send email via SMTP. When testing it, get this SMTP Error: SMTP Error: The following recipients failed [address]" Based on my research and a ...
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5answers
4k views

Is the IIS SMTP Server good enough for a production server?

I was planning to use the SMTP server that comes with IIS7 (for a website) but then I came across this link and started to get worried (read the accepted solution), on the other hand I have a limited ...
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5answers
180k 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 ...
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1answer
3k views

Setting the IP address that the SMTP service uses in Windows Server 2008

My ASP.NET application running in IIS7 on Windows Server 2008 needs to send email. I added the SMTP feature to Windows Server 2008. The problem is that my server has multiple IP addresses and I ...
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4answers
6k views

Fastest way to allow sendmail relay through smarthost?

I only want sendmail to relay through my ISP's smtp server, nothing else. How do i set it up?
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7answers
27k views

How to configure php.ini with remote SMTP?

How do I configure PHP to send mail using mail() via a remote SMTP server? I've tried to do this using php.ini but it seems that you can only do that under Windows32 and I want to do this on my Unix ...
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3answers
1k views

Postfix or exim: Automated/Programmatic and forwarded email setup

I'm looking to replace our current use of an external smtp provider with an in-house installation. It should handle the following situations: Certain addresses should be forwarded to gmail ...
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1answer
284 views

mstmp, Google Apps

I'm using Google Apps for my domains email, but should I use mstmp and hook it into sending via Google Apps? The reason I ask this is if I have to send high volumes of email, for example people ...
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3answers
2k views

How to relay SMTP directly from IIS 6.0 Server to Exchange 2003 server

Is it possible to force SMTP mail picked up at an IIS 6.0 server to be sent directly to an Exchange 2003 server on an internal network? Right now we have a third device in the middle which is being ...
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8answers
31k views

Send an email with an attached file using telnet or netcat

I often use telnet or netcat to connect smtp servers to send an email as a test. Does anyone know how you would send an email using telnet or netcat but attach a file as well? There are probably ...
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5answers
524 views

What strategy should i use to install smtp server on linux ? for multithreaded service

Hello all i need to implement service that sends users reminders via email , this should be multithreaded scheduled system this part is fine , but i need to install and configure smtp server for out ...
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3answers
2k views

SMTP server for Linux with simple configuration

I'm looking to replace our aging mail server and I've decided that I want to change the SMTP server software we use. We currently run exim. Over the years I've worked with a number of other MTAs ...
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2answers
10k views

Exchange 2007 can not send email to the Internet

We are currently in the beginning stages of migrating from Exchange 2003 to Exchange 2007. We have got to the point where internal mail between the two systems is working perfectly with all of our ...
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6answers
705 views

Monitoring incoming email server

What do people use to monitor that their email server is accepting external email? Most monitoring solutions send notices by email which is useless when incoming email breaks, so some other method of ...
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2answers
456 views

SMTP Outbound-Only: More or less reputable?

I'm reconfiguring some mail architecture and wondering about this... For the purposes of avoiding blacklists and maintaining a good MX reputation, is it better to have: One public IP / SMTP server ...
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6answers
2k views

Push email to a apache/php server

We've built a web service that needs to check constantly for email messages. Basically, an user sends us an email, and the server should make actions based on that email. We could use a crontab PHP ...
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4answers
22k views

Messages stuck in SMTP queue - Exchange 2003

I need your help people ;-) I have a problem with messages coming into our Exchange Server and ones going out through it. Basically, the messages are stuck in the SMTP queue. A message will come ...
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5answers
495 views

DNSBL - Email Servers Spam

I'm currently doing research on a better way for emailing customers our news letter and not using an ESP such as vertical response since most users there use purchase list and ruin the shared IPs for ...
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2answers
2k views

Can't connect to smtp (Exim)

If I type: telnet localhost 25 into SSH, it says: Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. Connection closed by foreign host. However, when I ...
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3answers
392 views

How to get Windows Mail (Vista) to send mail?

It's throwing a "Socket Error: 10060, Error Number: 0x800CCC0E" error on send attempts. So far my googling and binging reveals that a lot of other people seem to have the problem, but none of the ...
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2answers
1k views

Block mails with local from-addresses from unauthenticated senders using courier-esmtpd

We run a small courier mail server (courier-esmtpd). It is configured to accept mail from authenticated clients without recipient restrictions and mail from everywhere to local addresses: ...
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6answers
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Monitor Outgoing / Incoming email

Do you know any freeware software that I can install on our computers in order to silent log (to a folder, or forward to another email address) all received / sent email from that computer? The idea ...
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2answers
707 views

SMTP Error 5.7.1 when sending external mail to sharepoint

I have SharePoint setup to receive mail from exchange 2003 and all works great internally. However when I send a mail from a external source it fails with a 5.7.1 error. I have setup a SMTP connector ...
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5answers
33k views

How do I configure reverse DNS for a SMTP server [duplicate]

We use iis 6 to send out emails for our website but some email addresses bouce backs. It only appears to be 2 addresses. There is at least 100 different email addresses sent to at the same time as ...
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3answers
529 views

Exchange 2003: Outbound messages delivered locally

I'm trying to setup Exchnage 2003 in our test domain to send outbound messages. I would send an email to a gmail address, for example, but in the Message Tracking Center's message history for this ...