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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IIS6 SMTP for Inbound Mail - Wildcard Certificate?

We have a Win2k3 server with IIS6 SMTP installed and configured. We only need inbound mail for this, which is working fine at the moment for testing, but there's no encryption configured at this time. ...
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1answer
898 views

Server has Multiple IPs, IIS SMTP Sends on wrong one?

My Server has 4 IP addresses. (IPs are for example only) 1.2.3.4 1.2.3.5 1.2.3.6 1.2.3.7 Under IIS, I have a Virtual SMTP Server on 1.2.3.5, on port 25. The virtual server installed there at the ...
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3answers
1k views

Has anyone used Amazon Simple Email Service (SES) and if so does it have standard SMTP configuration?

We want to use the more advanced features of Amazon SES such as their API for having better control and visibility over emails. However I also want it to work OOB with our current system which is ...
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2answers
6k views

How to setup a Postfix SMTP-only for multiple domains

This is my first question on Stacks. I always read a lot of solutions to problems here almost every other day. So thank you to all contributors. I am a noob here so please spare some space if I am ...
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2answers
1k views

dovecot/postfix: can send & receive via webmin, however squirrel mail and outlook fail to connect

I have just finished setting up dovecot and postfix on my server (centos 5.5/apache) earlier today. So far I've been able to get email working through webmin (can send/receive to and from external ...
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2answers
848 views

Can I hide the expanded alias in a bounce message?

While looking at my mail queue I noticed the server was attempting to send back a bounce email, presumably to a spammer. Reading the error, I noticed that it was revealing the expanded value of a ...
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2answers
323 views

How secure is our companies SMTP server if the PHP MAIL function can use it?

My company has just switched from having our e-mail hosted through a web hosting company to hosting it ourselves. I have been using PHP's mail function for forms on our website and because the web ...
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2answers
324 views

Explain how communicate 2 smtp servers

Plese, explain me, how two smtp servers communicate betwen each. When i write e-mail and send it to other user, my client communicate with my smtp server by smtp protocol with ehlo/mail from/ rcpt to/ ...
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2answers
835 views

Sending e-mails with SMTP from PHP on Ubuntu Server

I having problems sending e-mails from my PHP application coded with CodeIgniter framework. I've a fresh install of Ubuntu Server on a VMWare with Apache, PHP and MySQL. The error I get is the next: ...
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2answers
341 views

Lean & mean, basic SMTP server, for use over a single domain, no fwd'ing

Looking for recommendation for a light-weight, SMTP server, with basic capabilities (will be run on port#25, with authentication but clear-channel), and it's use shall be limited to a particular (or a ...
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3answers
268 views

proxy software to relay email

My some software applications need to relay emails to my email account. The only way they can do it via connecting to localhost which relays mail on behalf of application. I have forgotten the name ...
2
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1answer
585 views

DKIM for email through Google Apps domain with external outbound relay

I'd like to enable the new Domain Keys DKIM email authentication feature for a domain hosted in Google Apps. Some of my users use an external SMTP gateway (such that when they send email, it doesn't ...
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1answer
130 views

SMTP and IIS maild from my website

I am using the free version for Google Apps to host my mail. I want to set is so that mail is routed via google apps as this will give me a much better reputation and mail will not go to the spam ...
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1answer
107 views

receiving two emails to virtual alias

have a virtual alias setup in /etc/postfix/virtual that reads: @mydomain.com mydomainincoming I then have a pipe setup in /etc/aliases that reads: mydomainincoming: ...
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4answers
471 views

tunneling smtp connections from localhost to another port

Ok, so Many ISPs are now blocking port 25 on outgoing connections, so I set up an smtp server on port 1025. Now this works great and configured clients send mail properly. But for most of the code ...
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1answer
545 views

smtp sasl authentication failure

I have configured and fixed almost all the problems with my postfix +courier + mysql setup for virtual mailboxes. I can now receive mail and send it from webmail (squirrel). BUT, what I can't do is ...
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2answers
12k views

How to setup a reliable SMTP server on Windows Server 2008 R2

I know there are SMTP services out there which you can pay to send e-mails with but surely it's not that difficult to set up one of your own. How can I set up an SMTP server on Windows Server 2008 R2 ...
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1answer
220 views

Is there a way to send Google Apps email from within my gmail.com account without having it say mailed-by gmail.com?

I like working from my main gmail account for everything. My company uses google apps. I've enabled my gmail to send emails on behalf of my work email, and it does this, but in the mailed-by field it ...
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3answers
4k views

IIS6 Virtual SMTP server isn't coming back up automatically after a system restart

I've got a virtual server running Win2008 RC2. I've set up IIS6 with a virtual SMTP server on it to be the mail provider for the websites I'm hosting there. It all works great, but if for some reason ...
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2answers
3k views

SMTP server for centOS, other than Postfix?

I need to install smtp server on centOS, but I don't want to use postfix. please suggest some others smtp servers and how install using putty.
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1answer
324 views

Emails from Google Apps to custom SMTP server delayed by 1 hour consistently

The outgoing mails from Google Apps/Gmail to our own custom SMTP server are getting delayed by 1 hour consistently. mxtoolbox.com diagnostics of our custom SMTP server are looking OK. Our custom SMTP ...
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3answers
815 views

Email date is wrong/missing

In the typical email setup when an end user views the date of an email, is that supplied by the sending server or the receiving server? Every once in a while I'll get complaints that the date on an ...
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1answer
5k views

sendmail: SMTP host name lookup failure

I haven't made any changes to sendmail and now it's failing to send any email out due to this error (I use my ISPs SMTP server): Jan 28 10:34:36 zenorebirth sm-mta[3225]: p0S9htol031342: ...
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1answer
229 views

smtp mail problem when sending with gmail smtp server from wampserver2 localhost

Please ignore, I found the ssl in the php extensions after all. Funny how you find the answer by yourself right after you post. This question is related to development but I think it has to do with ...
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2answers
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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
897 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
473 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
274 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
418 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
602 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
302 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
754 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
432 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
5k 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
394 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
116 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
2k 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
445 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
264 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
3k 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
140 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
627 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 ...