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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2
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2answers
128 views

Connecting to Postfix via TLS

First off, I'm a programmer without much experience in programming with network protocols. That being said, I'm attempting to connect to a Postfix SMTP server using a secure connection. The ...
-3
votes
2answers
875 views

Error Code: 503 Unable to receive emails

I am running an emailing system using which I am able to send email. Of course my emails are directly moving to user's spam bin. Strange that I am unable to receive emails from any other domains. I ...
1
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1answer
2k views

Set up SMTP server to add global signature to all emails from Google Apps for Business

We are using Google Apps for Business for our mail server, but require a global signature (simple HTML) to be appended to every message sent. This is not a feature of Google Apps, although it is ...
2
votes
1answer
135 views

Effect of adding an external SMTP to a mailbox

For an Exchange mailbox (specifically 2007) an e-mail address can be added to the "E-Mail Addresses" tab of a user account. What is the effect of adding an external email? for instance, the user's ...
-1
votes
4answers
4k views

What Linux mail server is easiest to setup?

I need to send emails from web application using Gmail accounts. As far as I understand, sending them directly will freeze worker process for quite a long time (it's a Rails app running on ...
1
vote
1answer
476 views

UNIX SMTP client that supports MS Exchange proprietary (EXPS) authentication?

I'm trying to non-interactively send emails from Solaris through an Exchange 2007 server, but the Exchange server only allows Exchange Server authentication (OWA access is also disabled). Here's the ...
0
votes
1answer
153 views

Linux SMTP Server for Multiple Domains

I have had to transfer one of my sites over to a virtual server on a cloud provider from a shared host. I was planning on leaving the mailboxes on the shared host and just using the cloud for the ...
1
vote
1answer
920 views

PHP Warning: mail(): SMTP server response: 501 Must specify to address <address>

Cannot understand why I am getting this error - both to & from email addresses are valid (I use them daily) so cannot figure out how this is happening - any help would be appreciated. NOTE: This ...
0
votes
2answers
475 views

Setup a router to receive SMTP packets and forward to a third-party SMTP Relay

I have a micro-device that is capable of sending out emails via an SMPT Client. However, the device does not have a DNS Client, so the only way to send out email is to specify the IP Address of the ...
1
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2answers
824 views

VPS - The easiest way to start sending email

I have installed (clean) Debian 6 on VPS, and I am running a Django-powered application on it. Everything works fine, except that I need to set up SMTP to enable my application (meaning sender is ...
0
votes
1answer
3k views

Setting up smtp on Windows 7 IIS 7.5

I have configured a php/mysql app on my local laptop using iis7 for testing. I use php mail() to send emails using localhost smtp service on the server and want to replicate locally for testing. (it ...
0
votes
2answers
904 views

DNS, SMTP Problem. Trying to send emails through PHP scripts using Gmail server

I have purchased a dedicated server some days ago and I think I don't have enough knowledge to configure its DNS etc. Well, I'll describe my situation. I have a dedicated server for virtualization, ...
1
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3answers
1k views

SMTP smarthost round-robin balancing

Our SMTP provider requires to distribute emails evenly between four different hosts. I understand that the standard way to distribute this kind of load is utilizing DNS round robin feature, but the ...
2
votes
2answers
517 views

Postfix with Dovecot configured and send emails with no errors. When sending from a remote client message-id is empty, and emails go to spam.

I have Postfix and Dovecot installed and running on the VPS. Using telnet once from VPS, and once from a client machine, I'm composing exactly the same messages. Everything is working but when sending ...
3
votes
1answer
185 views

Microsoft Hosted Exchange: Possible to outsource single mail account?

I have a customer who polls e-mail for a number of accounts in domain example.com via POP. Now they have a VIP user boss@example.com who wants to use Microsoft Hosted Exchange on his mobile phone. ...
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votes
2answers
67 views

Website/service that verifies if an email is valid (i.e. username exists on domain) [closed]

Given an email address I would like to not only verify the validity of the domain but also perform a lookup that checks whether or not the user's account is still active. Is this possible?
3
votes
1answer
2k views

Turning on UFW stops my e-mail client functioning (both imap and smtp) even though they are allowed?

I am using ubuntu 10.04 on a VPS. Without enabling UFW everythign works fine - imap using port 143. And sends emails using smtp port 587. However, when I turn on UFW a lot of problems are ...
-1
votes
2answers
105 views

Looking for a simple SMTP server that supports TLS and can run on Linux [duplicate]

Possible Duplicate: SMTP server for Linux with simple configuration I'm looking for a simple SMTP server that I can run without too much installation hastle and that which can also support ...
1
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1answer
3k views

SMTP error goes directly to Badmail directory after Queue

This is the error I got in the .BDR Unable to deliver this message because the follow error was encountered: "This message is a delivery status notification that cannot be delivered.". ...
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1answer
1k views

Adding IP addresses to IIS Virtual SMTP server en masse - is it possible?

So, here's the problem: I have to configure Connection Control IIS virtual SMTP server on Windows Server 2003, to be exact, which IP addresses can use the server. So, I run IIS Manager, open SMTP ...
0
votes
2answers
507 views

How to send email from non-TLS enabled client through TLS-only Gmail account

I need to be able to send email from a client (an OKI document scanner) which is non-TLS capable. But my company's email service is provided by Gmail-Google Apps, which is configured to force TLS ...
0
votes
1answer
951 views

detect malicious script used to send mail

i was recently used as an open relay and mass spam was sent through my server. i since then stopped it but my maillogs grow enourmously with this type of log. Aug 20 07:00:29 veepiz ...
0
votes
2answers
20k views

Configuring hMailServer email forwarding to use local SMTP on Windows 2008

I'm running into some issues setting up hMailServer to use the local SMTP on my server. I've got the local SMTP running and can send mail using telnet and through local .NET apps. The issue is with ...
3
votes
2answers
305 views

Change or spoof outgoing SMTP server name

Having a strange problem here. We send out emails from a web application that use an SMTP server setup on a Windows 2008 R2 server. Everything was working fine but one of our customers changed their ...
0
votes
1answer
265 views

Exchange 2010 default SMTP, lossing mail in transit

We have a server 2008 R2 with exchange 2010 sp1. We have recently encountered a very wierd issue. When sending emails to a specific email userA@domain.com, the email is not received by the ...
0
votes
1answer
346 views

Check if an e-mail address exists before sending [closed]

Is there a mechanism for verifying an e-mail address exists before sending?
1
vote
1answer
6k views

How to install POP3 and SMTP in Postfix? [closed]

I have Postfix installed on an Ubuntu box, but now I need to configure POP3 and SMTP. Is there some guide on how to do this?
2
votes
1answer
199 views

Email Address Generator

I'm developing a service which requires me to generate a new email for every "sign up." For example, person000@name.com, person001@name.com, person002@name.com, and so forth. My first attempt was ...
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3answers
2k views

How to use SMTP to send mail to some host?

I'm trying to use SMTP to send mail to my account on some server (say, on Gmail). So far I've tried: 220 mx.google.com ESMTP y14sm3079810ibf.45 HELO 250 mx.google.com at your service STARTTLS 220 ...
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votes
2answers
456 views

delete spam with mailenable [closed]

I am using mailenable on my VPS server. How can I set up mailenable to checking incoming emails to my server if they are spam or not and if so, delete them?
0
votes
2answers
806 views

can't receive external mail

Problem with the exchange 2003 server at our company users can send and receive mail from and to each other. receiving external mail (ex. from hotmail) doesn't work, sending to an external mail addres ...
0
votes
1answer
109 views

Hosting and configuring smtp servers

Note: I'm on a debian 6 box. I am currently using google apps for my smtp and i was thinking maybe i can put a smtp server on my box. I am wondering if theres any google/simple package i can use? I ...
7
votes
7answers
5k views

Very simple SMTP server for Ubuntu wanted

I'm looking for a very simple, lightweight SMTP server to run on an Ubuntu 9.04 VPS. The only functionality I need is to support the PHP mail command; <?php mail('caffeinated@example.com', 'My ...
1
vote
4answers
3k views

Storing emails elsewhere when Exchange server goes down

I will be setting up an Exchange email server at work soon but one thing I would like to know is what would happen if the mail server is down. Where would incoming messages go? I understand that ...
0
votes
1answer
239 views

Bounced emails for hosted sites bounce to nobody at the server - how to configure to return to the hosted site

I am helping out with some Linux admin work. The server hosts several sites. The admin interface used is WHM. When an email from one of the hosted sites bounces, the site is not notified - it just ...
1
vote
1answer
615 views

Need help diagnosing “User unknown in virtual alias table”

I'm using virtual alias maps to relay mail and I keep having some of the entries bounce. Postfix seems to know where they are supposed to go and when I run postmap -q for virtual_alias_maps and ...
1
vote
3answers
5k 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 ...
0
votes
1answer
170 views

Use sendmail as client for relaying mail

I'm trying to use an account on my central mail server to send all mails from other boxes. My central mailserver is itracknetworks.ca and I have an account there at testuser@itracknetworks.ca. I ...
1
vote
3answers
216 views

Network Hardware supports SMTP, but no AUTH information… Need to Send emails through SMTP with AUTH

I have a network device that supports sending email notifications, but doesn't provide for the username and password. I would like to point this device to an internal system which would then take care ...
0
votes
3answers
4k views

Mail not relaying in postfix

I am managing a server which mainly deals in relaying mail using virtual alias maps. For some reason unknown to me email that goes through these maps are getting bounced. I've checked to make sure the ...
2
votes
3answers
1k views

Why doesn't Postfix announce AUTH during EHLO?

I have setup postfix and dovecot, I can even receive e-mails and pick them up remotely using Thunderbird client connecting via IMAP However, I can not send out using the Smtp server, when I telnet ...
-1
votes
1answer
232 views

Is it safe to make ssmtp SUID root?

I'm using ssmtp, and I would like to not make my /etc/ssmtp/ssmtp.conf world-readable, because it has my gateway password in cleartext. But if it is mode 600, then ssmtp run as an unprivileged user ...
4
votes
2answers
214 views

What is the difference between 3-digit and dotted SMTP error codes?

When looking up SMTP error codes, I sometimes see "550", or "5.5.0". (And sometimes the number in the dotted code is different.) I found the numeric codes defined in RFC 821 and the dotted codes in ...
1
vote
1answer
330 views

Windows mail server that supports username wildcard aliases?

Is there any free mail server (in this case POP3) for Windows that supports aliases? e.g. User name: iboyd Aliases: ian@serverfault.com ian.*@serverfault.com ...
1
vote
1answer
528 views

What's a good open source solution that supports push e-mail?

Currently using Exim4 + courier-imaps + spamassassin but would like to get push e-mail on my iPhone and Android devices!
2
votes
2answers
227 views

Ubuntu, mail servers and MX records

Some background: I have set up an Ubuntu cloud server on Rackspace where I host two domains, say, www.domain1.co.uk and www.domain2.co.uk. Both domains are hosted on the same cloud server. I ...
0
votes
1answer
538 views

Adding To: header to incoming mails using hMail server

I have just enabled plus-addressing with my instance of hMailServer. Now, whenever I sign up for an online service, I can easily provide a unique email address for that service. This is part ...
2
votes
1answer
185 views

Issue of tracking an email that was “lost in cyberspace”

The issue here is one of an email that has been "lost in cyberspace." The receiver is claiming never to have received it. However, I recieved an automated out-of-office reply as a response to my ...
4
votes
2answers
4k views

How to read the “MS ForeFront” antispam report in email header?

I'm trying to diagnose why emails I'm sending out from my server's IIS SMTP Pickup Folder are getting bounced back occasionally. One tech from a receiving company who couldn't receive the emails ...
0
votes
1answer
290 views

Relay Access Denied with virtual_alias_maps in postfix

My postfix server is encountering a problem with a couple domains bouncing email. The error message is: postfix/smtpd[2673]: NOQUEUE: reject: RCPT from mail.foo.com[xxx.xxx.xxx.xx]: 554 5.7.1 < ...