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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Smtp Server external to external

I have hMailServer set up on my windows server 2008 machine. I just started noticing in the logs that there are a lot of entries related to people trying to send external to external mails (obv spam?)...
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4answers
198 views

Server 2003 answers ping, but wont serve http, ftp,smtp or pop3

After reboot, my server wont respond to any incoming request until it is rebooted again. Then, about 5-6 hrs later, any website on it will return a ping, but it will not serve the page, nor will it ...
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1answer
68 views

How can I make so IIS SMTP uses Credentials when connecting

MY SMTP is working without any password or username, Iam trying to configurate my SMTP so it uses credentials when sending mail. On my ASP.net app I have added credntials, but the SMTP works also ...
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2answers
938 views

iptables only allow smtp connections with start tls

Is it somehow possible to block/abort unencrypted smtp connections with iptables? effectively rejecting all connections which dont do a start tls.
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2answers
623 views

SMTP server hacked and Spammed - hotmail.com blacklisted

We recently set upp a new SMTP server and during the night someone used it to spamm. Next day We saw that it was over 90 000 mails in the queue folder. After that I chaned the incoming port and also ...
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2answers
108 views

Postfix attempting all delivery virtually

We have Postfix configured for virtual domains and virtual mailboxes and it's running quite nicely. However, Postfix now thinks that everything except my_destination should be delivered virtually. ...
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1answer
129 views

SMTP Server software above Windows 2008 SMTP?

i need some software which has more functionality than regular Windows built-in SMTP server. What i'm interested in mainly is fine looking logs of successes versus failures and email scheduling. Is ...
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3answers
5k views

550 Requested action not taken: mailbox unavailable

I setup a small box with Server 2003 64bit to be used as a webserver and email server for a small school. Real simple stuff for a few users. A simple website and a handful of emails. rDNS and spf ...
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1answer
153 views

Recommend a reasonably priced email provider?

We have around 50 domains that aren't core/key business but ideally we want to be able to have the MX records pointing to someone to accept mail for the following: abuse@ and postmaster@ for all the ...
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2answers
484 views

SMTP Relay to Multiple Hosts

I have a situation where I need to configure an MTA to relay messages for a single domain (@example.com) to multiple (3) seperate SMTP servers. Email for user@example.com received on SMTP-1 needs to ...
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3answers
2k views

Unauthorized email is sent using google apps registered domain

I have a domain name 2m.lt registered and added to google apps. There is an option there that all the email adressed to my domain (*@2m.lt) is forwarded to my mail email account (admin@2m.lt). Well ...
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1answer
298 views

Sending through SMTP to same domain [duplicate]

Possible Duplicate: IIS SMTP server (Installed on local server) in parallel to Google Apps We have a website set up for www.clientname.com(and also clientname.com), running on a windows server ...
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2answers
362 views

SMTP server to be used for Email Marketing Service

I am trying to build a email marketing service company. I am a .net programmer and I have played around trying to build a custom SMTP server but a lot of problems came up when domain keys into play. ...
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1answer
327 views

Debian/PostFix/Gmail not playing well

I followed these instructions and took hints from other sites. I cant get my server to send emails using google apps (i spent 3 hours on this already.) I get the error Authentication Required. ...
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3answers
4k views

How can I forward to a specific MTA based on email address?

How can I forward incoming messages to a specific MTA based on the username portion of the recipient's email address? I would prefer linux-based software, but Windows would work too. Background: Our ...
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7answers
15k views

My SMTP's outgoing mail gets bounced [duplicate]

I've got a ISPconfig 3 production server set up, running Ubuntu Server 9.04. My e-mail gets delivered ok to almost every other server I send mail to except for one (smtp.chello.nl which bounces my ...
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1answer
375 views

Find my POP server's address

I recently took over a server (Ubuntu 9) that is set up to send and receive email and uses RoundCube as its webmail interface. The folks who use the machine don't like RoundCube and want to do ...
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1answer
55 views

Unix inbox line wrapping behavior

I've developed an application that parses data from unix inboxes, and retrieves the messages using IMAP. The main issue I'm running into right now is that the flat file inbox in /var/mail that stores ...
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1answer
2k views

Problems using hmailserver as outgoing SMTP server

I have hmailserver set up and accepting email for projectattack.co.uk domain - I can connect to the server through port 110 pop3 using both gmail and mail.app on osx I have a cname pointing smtp to ...
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1answer
120 views

Is there a way to detect recipient's mail server e-mail size limit?

I want to write a script that sends an e-mail with attachments (different sizes, different recipients). I wish prior to sending e-mail, somehow detect if recipient's mail server can handle the size of ...
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3answers
222 views

setting up an email server [closed]

i'm about to stop using gmail apps premium and i'm looking at using hmailserver and either zimbra or roundcube as the front end. My question is this: does hmailserver fit well with zimbra or ...
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6answers
890 views

Understanding what needs to be in place for a server to send outgoing email from a linux box

I am attempting to configure an openSuse 11.1 box to send outgoing email for a domain that the same server is hosting. I don't understand enough about smtp servers and the like to know what needs to ...
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2answers
2k views

Forwarding only bounce messages to a different SMTP server

I have a Postfix SMTP server that sends transactional emails from a web service. These messages use VERP for the return path, so bounces go back to an address like this: bounce-7232-useremail=...
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2answers
61 views

What possibilities do I have if I want to send mail from Windows Server 2008?

My intention is to be able to send mail from Windows Server 2008. What possibilities do I have? SMTP client, SENDMAIL etc.? What would be the best solution for this?
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2answers
92 views

Can I run two email service on 1 domain?

Can I run google email service and my web hosting email service on 1 domain? domain.com <--- on google service (top level domain) mailman.domain.com <--- on web hosting service (sub domain)
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2answers
330 views

Setting up an smtp server to send mail for a domain hosted elsewhere

I'm not a server admin, so these might be dumb questions... I have a client I'm building a web app for, who asked me to set up a mail server on the VPS it's hosted on to send emails rather than send ...
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1answer
368 views

Exchange SMTP Not setting appropriate message-ID

Related to my post here on SO: http://stackoverflow.com/questions/3638584/smtpclient-sending-bad-messageids/3638682#3638682 It was brought to my attention that our exchange settings may be incorrect....
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1answer
469 views

Where/How Can Spam False Positives Be Reported To MessageLabs?

An email I sent got flagged as spam by MessageLabs on the recipient side. I'd like to proactively engage MessageLabs to tell me more about why this got quarantined (or at least fix it). Is there ...
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1answer
1k views

WSUS Email notification

Can i use gmail as SMTP server for wsus ?
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1answer
156 views

Secure e-mail with SMTP Virtual Server in Windows 2008

Is it possible to send encrypted and digitally signed e-mail messages using S/MIME through the SMTP Virtual Server component included in Windows Server 2008 or do I have to use Exchange? If it is, ...
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3answers
3k views

Postfix with no auth setup in Ubuntu?

Now, postfix has been setup by auth. I want to remove user login with username and password. I want to make anonymous SMTP Mail server. What path should I change or what line should I remove ? my ...
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1answer
3k views

Interpreting Exchange message tracking log events for unreceived emails

I'm working on a new Exchange 2010 server that may be having issues sending emails out to a particular ISP. I have verified it is not on any blacklists, no bounce messages are ever received, and the ...
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3answers
238 views

Mail relays or SMTP services for use in code

I'm looking to start using an SMTP or mail relay service. I've found quite a few out there, but I'm not sure if there are advantages to one vs another. The only requirements I have are: can send "...
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5answers
1k views

Failed PCI Compliance - The remote SMTP server is vulnerable to a buffer overflow

Hey guys, I have tried allowing the scanners IP to be accepted through IPTABLES into the SMTP port, but the scan still fails. This is the error: The remote SMTP server is vulnerable to a buffer ...
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1answer
1k views

qmail responds 502 unimplemented on STARTTLS

I am trying to send mail with php using the PEAR Mail_queue package. It should be working, and it appeared to work twice, but for some reason I keep getting the following error response from qmail: ...
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1answer
2k views

Why does Exim puts emails on hold if there are frozen messages in the queue?

I've a CentOS with CPanel server working as a SMTP server, which currently uses 20 different hostnames and IP addresses to deliver email for an email newsletter service. However, it's extremely slow ...
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1answer
525 views

How to setup a web server with remote SMTP

I have 2 severs, both running server 2008 (R2) One is the web server, one is running as a mail server. The setup I want is that any mail sent from apps (php, asp and asp.net) on the web server are ...
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0answers
74 views

Ariel will not send through our SMTP server

I'm currently working at a university that uses Ariel software to send ILL documents to teachers at other universities. They do this by e-mail the documents to the users. We recently switched from ...
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1answer
90 views

Win Server 2003 VPS - MailEnable?

I've got a 64bit Windows 2003 VPS server. I need SMTP and POP for a low traffic website. Essentially there will be 1 POP user (admin@mywebsite.com). I want to do everything possible to make sure ...
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2answers
912 views

Ubuntu Based SMTP Server?

We are currently using this SMTP server by Argosoft for sending emails from various web applications running on different servers throughout our network. This thing runs great but I would like to ...
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1answer
15k views

Postfix: How to make aliases work for virtual domains?

I'm trying to set up a local mailserver. I run Mac OS X Server 10.6 Snow Leopard, and it uses Postfix as server. I set the server up using the GUI and I'm doing all virtual settings via the terminal. ...
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1answer
467 views

How do I view headers, and message source in Hotmail [closed]

Hotmail changed their interface, and now I can't right click on the message (in list view) and view headers. Also I can't see the page source, besides the clutter within the regular HTML markup. Can ...
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1answer
212 views

Can sendmail be used as an SMTP server?

I'm trying to setup debugging in my Pylons website and it allows for emails to be sent when an error occurs. The configuration asks for an SMTP server. It's running on Linux and I've always thought ...
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1answer
117 views

Inbound SMTP Access Problem

I setup an e-mail server(smarter mail) in my vps. Everything works fine except the inbound SMTP server. I can send email but cannot receive. All the required ports and programs are allowed on firewall....
2
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4answers
291 views

Exchange Antivirus - On Box or in the Cloud?

Our Exchange aware antivirus product is due to be renewed in a little over a month. These days it's reduced to doing little more than antispam and attachment blocking. Part of me is tempted by a ...
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2answers
545 views

using a commercial mail server to route emails to aviod black listing [closed]

We currently have 6+ web application servers all doing direct delivery from IIS ( SMTP service ). Every couple of months we have to clear ourselves from block lists and having no visibility of emails ...
2
votes
2answers
2k views

Postfix restrict which users can send out without authentication

Possibly a simple question but I'm trying to lockdown which users can send email from the local machine. I've locked down which ones can receive by running newaliases on an /etc/postfix/...
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3answers
6k views

Postfix & TLS is configured correctly, but Thunderbird throws cryptic errors when trying to send email via SMTP & STARTTLS?

I've just recently installed CentOS 5.5 and Postfix for the first time ever. I've followed 2 different tutorials which are supposed to enable TLS on the SMTP server. Both of which told me to create a ...
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1answer
541 views

Sendmail - use custom port for specific domains

CentOS 5.x | SendMail Hi, I need to route email for specific domains to a custom port on a downstream server. Is there an easy way of doing this? I came across various instructions describing how ...
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2answers
2k views

554 Transaction Failed message on some messages only

One of our users has been sending emails to a particular client with no problem for the last year. Suddenly, today, he started receiving Undeliverable - 554 Transaction Failed messages for some of the ...