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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Prevent SMTP Connections From Outside Localhost

I have a web site which needs to send email to confirm orders and alert subscribed users of certain events. I do not need to send email through the server for any other reason, so I would like to ...
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328 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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Using ClearOS as a gateway/firewall/mailserver

Just installed ClearOS on a PC to act as our firewall firstly and then to act as an internal mailserver. My question is: Can i create a mailserver that then routes the mail through to our ISP mail ...
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SPF Setup - Sending from VPS and Google Apps

In follow up to my question here, how on earth do I setup a SPF record?!? I understand that I have to add a TXT record to my DNS entries but what to put in that TXT entry is what's confusing me... I ...
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2answers
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550 Invalid HELO/EHLO must contain a FQDN or IPv6

I've got a Windows Server 2008 box where I host a number of websites (on different domains) that send email as part of their functionality. I've been checking up on the SMTP events and found a number ...
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2answers
451 views

Novell Groupwise 7 SMTP Setting

Our Groupwise server currently uses an outbound SMTP server for all outgoing mail not within our domain. Is it possible to force Groupwise to use the SMTP server for ALL mail including addresses ...
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1answer
2k views

Mail command using alternative SMTP port?

I have setup an SMTP server on port 10025. I wanted to test sending emails to it via the command line. Is there a parameter I can give the mail command to use the smtp server on 10025? echo hello | ...
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1answer
622 views

how to add mail boxes to iis 7 smtp

may be an easy one for the pros but for me quite hard.. Hi I have installed iis7 and enabled SMTP. Where do i start adding email addresses. I know this sounds stupid but I just dont know where to ...
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Exchange Server vs. IMAP

I've been using a hosted exchange server environment (dslExtreme) for years. Originally, I used it w/ Outlook, but now that I have a Mac, I use Entourage. I also use my iPhone to connect to my ES ...
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1k views

How to set up my own computer to be an smtp relay only on my private network?

we have mac os x server which isn't connected to the internet, but it's hosting some collaborative tools which is used internaly only (lan). Some of those tools send notifications, but our mail ...
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6answers
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How to find SMTP server admin contact

For some reason at&t's smtp server, atlsmtp.cingularme.net is dropping messages coming from our SMTP server. I would like to contact their sysadmin to see why that is happening. However, I can't ...
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Telnet to smtp server port 25 --> Connect failed

I want to send an email via telnet. When I typed to the command prompt telnet 'smtp_servername' 25 the following message appears Could not open connection to the host, on port 25: Connect failed ...
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303 views

E-mail duplication problem

I have taken out a hosting agreement with a well respected hosting provider for a couple of internet facing servers. We have deployed several applications to these servers which send various e-mails ...
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1answer
505 views

Windows 2003 SMTP virtual server, why emails are not delivered?

Configured Windows 2003 as my email client, everything works fine with POP3 (i'm able to recieve emails), the problem is with SMTP and i can't figure out how to find where excatly this problem is, ...
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1answer
972 views

JavaMail application won't send email to external SMTP server

This is actually a question from an exam, but I believe it could help others troubleshooting a similar situation. In a system, an e-mail needs to be sent to a certain mailbox. The following Java ...
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1answer
192 views

When sending emails through smtp do I need to setup DomainKeys and any kind of other email config?

When sending emails through gmails smtp (smtp.gmail.com) do I need to setup DomainKeys and any other kind of email config?
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3answers
319 views

Does our IMAP access have to be behind our VPN?

I work for a small company (around 40 people) and our email is available via IMAP - but only when connected to our VPN. For iPhone users (and generally), the VPN connection appears to be an ...
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1answer
576 views

Exim log and send all mail for a given domain through another server

I administer a handful of shared web hosting servers. Recently, Yahoo has been deprioritizing/greylising all email sent from these servers. I am getting the dereaded 421 4.7.0 [TS02] Messages from ...
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2answers
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Windows SMTP server suggestions? [closed]

My ancient mail server machine crapped out a few days ago. I cobbled together another machine from spare parts and the bone pile, which included reformatting the existing disk and installing a fresh ...
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2answers
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Exchange 2003 SP2/2007: Address space ignored in SMTP Connector

MS and Postini (Google) are in a tizzy, and long story short, Microsoft was/has blocked Postini's IP block. I think it's been lifted again, but my workaround isn't working (see below). I have a ...
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Setting up two Exchange servers to receive mail on their old domains while sending and receiving using the same new domain

The scene: A merger of two companies. One running Exchange 2010, the other Exchange 2003, both having Active Directory Schemas at Server 2003, SP 2. Short term goal: Establish a trust between both ...
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2answers
664 views

Please explain my VPS's Mail Queue Manager

On my VPS in WebHost Manager I have an area called Mail Queue Manager. I frequently have a few messages built up in there that seem to contain viruses and other problems. What are these messages, ...
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3k views

sendmail vs smtp server

I currently don't have a SMTP server setup. However, in my PHP code, I send all my SMTP request to sendmail. Are there any down fall to using this procedure? If yes, what are the advantages of ...
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2answers
513 views

Convert old computer into an SMTP server

I'm new to server hosting and whatnot, but I have a question regarding SMTP servers. I have an old computer lying around and would like to make use of it. Is it possible for me to have this machine ...
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3answers
5k views

Trouble with IIS SMTP relaying to Gmail

I appreciate that similar questions have been asked about how to setup SMTP relaying with IIS's virtual SMTP server. However I'm still completely stumped on this problem. Here's the setup: IIS 6.0 ...
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1answer
818 views

How do I get SMTP Port 25 to be PCI Compliant on OS X 10.6 Server?

When running PCI security scans on this server it fails on port 25 with: SSL Server Supports Weak Encryption nCircle ID: 6174 Port: 25 CVSS Score: 5.8 Not Compliant Description The SSL (Secure ...
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2answers
278 views

Users can't send mail through smtp

I have my own mailserver, it used to be hosted by Hostgator but now I have a VPS. From my home location I can send and receive mails as much as I want. It even works on my phone. My other users also ...
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1answer
480 views

How to force internal email through an smtp connector in exchange 2007

I have reason to force internal messages through an smtp connector. Can this be done?
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3answers
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Local authentication free SMTP server for GMail

There is an application that cannot use GMail SMTP with authentication. I want to know if there is a possibility to create a local proxy SMTP server that will send mail via GMail? So I can assign ...
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2answers
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IIS6 cdo.message cannot send emails access denied error

Got some very basic email code on a iis 6 server to send a test email. Relay is enabled on exchange server for this server, the iis user has write permissions to the directories for mailroot and all ...
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581 views

Problems when using IIS SMTP Pickup Service

In my website, I send emails from my website to IIS SMTP Server (using the pickup drlivery method). IIS SMTP server is set up to forward the emails to a local mail server, XMail Server, running on the ...
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2answers
952 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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IIS/SMTP - emails are stuck in mailroot/Queue

I'm trying to send e-mails via SMTP within the IIS pickup directory. Unfortunately the e-mails are just going into the mailroot/queue folder and stay there. They never actually get sent. Does ...
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3answers
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Any gotchas for using multiple SMTP servers for a single domain?

We want to run the majority of our mail (inbound and outbound) through a third-party service provider. We also want to keep an SMTP server running onsite that will be used with existing automated ...
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154 views

Do outgoing SMTP servers need to have assigned domains?

Do outgoing SMTP servers need to have assigned domains? If a domain name is not assigned to an outgoing SMTP server will it increase the spam score?
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2answers
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SMTP service on Windows 2008 R2 Core

I have setup a server with Windows 2008 R2 Core Web Edition. The question is, how can I install the IIS7 SMTP service? Or is SMTP missing in the Core editions? Thank you
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PDF Corruption When Sending with Microsoft Products

I have the same PDF corruption problem in two different offices that I am the tech support for. Office 1: Started in the middle of December. PDF received from outside the office and is viewable with ...
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3answers
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Using an SMTP server that isn't attached to my domain?

I have some clients for whom I manage hosting but I don't actually run the hosting servers. Most of the domains are together on one server/IP address (along with other domains that aren't mine). One ...
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2answers
118 views

Postfix smtp mail loging

Google fails me... Is there a way without modifying Postfix code to get copies of emails sent via smtpd server? Anything will do - text file, pipe, local socket. I just need Postfix giving me time, ...
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1answer
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Problem sending mail “Client host rejected: Sorry, no xDSL here”

I'm trying to use SMTP on localhost to send emails thru a simple mailform in asp.net c#. For some reason all emails end up on the badmail folder. The .BAD file says: Final-Recipient: ...
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3answers
263 views

SMTP server to edit email content on the fly

I am looking for an open-source / free SMTP server that will enable me to automatically change the content of outbound messages via a simple search & replace (or regular expression). It should be ...
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2answers
22k views

Easiest way to configure local SMTP server to relay through gmail on Windows?

We have gmail for our corporate email provider. I want to be able to send mail through smtp.gmail.com from ASP.NET. I have managed to do this just fine - and it has the benefit of all sent items ...
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2answers
2k views

Postfix relay with Exchange Server

Is it possible (or even logical) to use Postfix as relay MTA with Microsoft Exchange Server 2007, and if so how?
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Sending Email by SMTP IIS7 Server on Windows Server 2008

I have a website that sends out email The C# code to do this is: var mailClient = new SmtpClient { DeliveryMethod ...
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2answers
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Exim send failure “421 SMTP incoming data timeout” - Message body lacks '\n' at the end

I'm trying to figure out how this issue is occurring and how to stop it. Somehow messages are getting into our inbound Exim spool without any \n at the end. When our outbound Exim process tries to ...
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2answers
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How to avoid mails going to SPAM (Configuring SMTP Server on IIS)

How to configure SMTP Server in IIS such that the mails sent from my Server doesn't go to the spam box of gmail, yahoo, or hotmail ?
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How can I add a domain to an IIS 6 SMTP server so that it will relay for that domain?

How can I add a domain to an IIS 6 SMTP server so that it will relay for that domain? eg. If I have an email (from address: test@test.com) coming over the net from a server with IP address 1.2.3.4 ...
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259 views

Mail sending error in VBA form

: I am getting the following error The host 'smtp' could not be found. Please verify that you have entered the server name correctly. Account: 'pop3', Server: 'smtp', Protocol: SMTP, Port: 25, ...
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3answers
762 views

Postfix mailq - send every x minutes

I got about 2000 clients on my website that have subscribed to our mailing list. I've used in the past Swift Mailer but it didn't work the way it was supposed to. I'm wondering if there is a way that ...
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2answers
875 views

Intercepting SMTP traffic

I'm looking for a way to intercept outgoing SMTP messages from a few users on my network. Sadly I'm dependent on an e-mail provider and can't set up my own e-mail server.