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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3answers
1k views

SMTP session between 2 mail servers on the internet: Without authentication?

I have some basic question about SMTP (try not to laugh too much). When i try to use SMTP via telnet to send email on google it requires authentication. Mail servers use SMTP to relay messages ...
2
votes
3answers
1k views

How can I route a SMTP message by FROM domain (not To, CC, or BCC)

I'm handling email for many different companies. Each company needs me to route all outbound email through a specific SMTP relay based on From address. What software configuration or technology ...
2
votes
1answer
226 views

Setup Postfix as a relay / filter

I need to have Postfix set up to work with Lamson. Despite my research on the web, i haven't figured out how to configure postfix. I'll have a server (A) that will forward all its email to a second ...
0
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1answer
297 views

Redirect Incoming mail to another servers

I do not know what are the options are and how to google them and I am little far from the subject, so I am asking it here: We are a student club and we have a virtual Ubuntu server by our school, it ...
3
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2answers
1k views

Amazon SES vs EC2 Smtp server

We have an existing smtp environment setup in an EC2 instance which is used to send Transactional emails like password reset. Now we have a requirement to send System emails to a large user base in ...
1
vote
1answer
743 views

Disable local recipient check in Postfix

I am trying to setup Postfix on CentOS. I have configured it to use my Google apps account to send mails. Lets say I have configured Postfix to use user1@mydomain.net, which is a Google apps email. I ...
13
votes
5answers
10k views

What host name should the SSL certificate for an SMTP server contain?

I have a server foo.example.com at 192.0.2.1 It runs exim to receive e-mail for several of my domains. My domains each have an MX record pointing to mx.example.com, which resolves to 192.0.2.1 If I ...
1
vote
0answers
278 views

Mail smtp server configuration for PHP and RHEL

I'm running WordPress on an intranet VM and I need all outgoing messages to reach a remote smtp server. In php.ini there is this specification: [mail function] ; For Win32 only. SMTP = localhost ...
0
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1answer
826 views

ClearOS SMTP Server Setup using Gmail SMTP

How to set up ClearOS SMTP server using gmail SMTP? I'm using ClearOS as IMAP mail server. Receiving mails from pop hosting is no problem. But to setup SMTP for client using the same server is a ...
7
votes
4answers
12k views

Disable SMTP AUTH on Port 25

Due to PCI-DSS, we are required to disable plaintext authentication. We've achieved this by encapsulating communications between our mail server and clients with TLS on port 465. The problem lies in ...
0
votes
0answers
150 views

SMTP server force outbound traffic [duplicate]

I'm having some trouble with setting up a SMTP server on a windows server 2003 machine, while trying to send emails using PHP through the internet, but to domain email addresses. Common info: I'm a ...
1
vote
3answers
140 views

SMTP server force outbound traffic

I'm having some trouble with setting up a SMTP server on a windows server 2003 machine, while trying to send emails using PHP through the internet, but to domain email addresses. Common info: ...
0
votes
2answers
1k views

Setting up SMTP server (Windows 2008 R2) to use with Microsoft Data Protection Manager

DPM is installed on one of our servers - namely Datacenter. Essentially, there is no Exchange server in the domain, so we wanted to setup our own SMTP, and use a gMail account to forward ...
0
votes
1answer
415 views

How can I anonymously logon to Exchange 2003 SMTP server to send mail?

I have anonymous logon enabled on the my Exchange 2003's virtual SMTP server however trying to send emails (using the program VisualSVNServerHooks: http://www.visualsvn.com/support/topic/00018/), I ...
5
votes
2answers
643 views

Load Balance Mail Gateways

I am currently trying to find a way to Load Balance our 4 Mail Gateways ( Running Mail Cleaner). I was able to bring up HAProxy and use tcp mode to load balance without issue. The only real problem ...
0
votes
1answer
848 views

Drupal Commons using sendmail with Gmail SMTP smart host: Account suspended for abuse

I have a Linux VPS with two Drupal sites, one of them using Drupal Commons. Both installations are told to send mail via sendmail, which in turn is configured to relay mail to the Gmail SMTP server ...
1
vote
1answer
121 views

SMTP server configuration changes for Ubuntu 9.10 (Karmic Koala)

I will start to say that I am cough a MS dev and not a sys admin so please go easy. I have a server on the cloud that runs Ubuntu 9.10 (Karmic Koala) and is just a mail server. A lost friend of mine ...
1
vote
1answer
101 views

Configuring E-mail server to allow review of each outbound email

I want to have a separate person reviewing the style of outbound e-mail correspondence sent by new employees. We have an MS Exchange in our organization, but I can look into any e-mail server system ...
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votes
1answer
77 views

PostFix | SMTP Server [closed]

What is a Post Fix, Can some one explain in a very Simple Language. I have a dedicated server, what is needed to Install on it so that I can Convert it into SMTP, with authentication.
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votes
2answers
168 views

How do I find out if my email server sends out an ip address with my emails? [closed]

I read in a publication that most major email providers include your ip address when sending out emails. The exception being gmail. I'm told this can give you alot of spam. Here at work, we use our ...
0
votes
1answer
270 views

Configuring postfix to use TLS for a particular server?

Running kubuntu 10.04 on my host, let's call it alpha. I've got postfix as my system MTA. I've got crons running on alpha that need to send email to a remote host, let's call it mailhost. I cannot ...
0
votes
1answer
95 views

What I can do to achieve this kind of smtp proxy

I'm providing VPS services and I don't want my IP addresses spoiled by spammers. What I want to achieve here is to route all the outbound traffic to some sort of smtp proxy server which will just let ...
1
vote
3answers
697 views

What is the difference between the sendmail submit queue and standard queue?

I'm confused on the purpose of the sendmail submit queue (by default /var/spool/clientmqueue). I think it's used to store messages when sendmail is ran in mail-submission program mode instead of ...
2
votes
3answers
364 views

How to use multiple external names for outbound HELO in the EdgeSync outbound Send Connector?

I have an Exchange 2010 environment where there are multiple Edge servers; the FQDN of each server ("serverX.domain.local") is different from the name used in the corresponding public MX record ...
0
votes
2answers
87 views

DNS, email and the MX-record (hosting a homepage, not the mail server)

I have the following problem: We are hosting a web site for a customer. So he changed his DNS A record to point to our virtual server. This works fine. Now we created a new domain on our side with a ...
0
votes
1answer
256 views

exim greylisting non-auth SMTP mail?

I have smtp auth set up on my exim4 Dqueeze server so that only auth'ed clients can use it as a mail relay. I believe this is working, e.g. thunderbird (w/out password) reports that I am "not yet ...
1
vote
1answer
3k views

What is the role of the “generating server” and/or “Reporting-MTA” in an Exchange NDR?

I'm a little confused on what exactly the "generating server" does in an NDR. For example, I got the following NDR back when sending to a specific domain: Diagnostic information for administrators: ...
1
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1answer
197 views

Postfix unknown command

I'm running two milters on my current postfix installation. I'm noticing that, from one particular client, they are sending an invalid command consisting of the first 3 letters of their domain name. ...
3
votes
1answer
484 views

Bash Script To Simulate SMTP Mail Receipt

How would I create a Bash script that simulates SMTP mail receipt and then drops the result into a Maildir-formatted directory (so that Evolution mail reader could read it)? I just thought it would ...
0
votes
1answer
40 views

Exchange 2007 Receive E-Mail for other Domains

My organisation has Exchange 2007 e-mail server, and now, we want to host e-mail service for other organisation (neworg.com) I added new Authoritative Active Domain neworg.com, but when adding a new ...
1
vote
2answers
2k views

do not require smtp authentication for a specific domain using hMail server

One of my clients has a needlessly complex e-mail setup for a couple of domains, which is causing problems when they try to send e-mail between them. They have a couple of domains where mail follows ...
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votes
2answers
116 views

How to send massive mail in Window [closed]

I'm looking for a solution that can send massive mail in Windows. I'm not spaming. My company want to send mail to our user. I don't want to use third party smtp server(like google mail). Because ...
0
votes
2answers
3k views

SMTP connection to gmail-smtp-in.l.google.com

I am writing an SMTP client in node.js. I successfully tested it against an SMTP server running on my localhost. However I found out that I am unable to connect to gmail's servers. Trying it with ...
1
vote
2answers
1k views

Postfix - Block email from non-existent local addresses

My question is very similar to this one, but for postfix. We keep getting emails from addresses like "accounting@example.com" delivered to our actual "@example.com" addresses. From my google ...
1
vote
1answer
638 views

Ruby on Rails application throws SMTP Authentication Error

I'm developing a Rails app which when I run it locally, it's able to send emails through a gmail account via smtp. When I moved it to my server, it comes up with the following error for example when ...
2
votes
2answers
1k views

Monitoring outgoing messages using EXIM

I work as an IT guy in a law firm. I am recently asked to make a system wherein all the outgoing emails coming from our server to our clients will be put on hold first and wait for approval before it ...
2
votes
1answer
372 views

relay_domains seems to be ignored by postfix

I am trying to set up a perimeter spam and malware filter using CentOS/Postfix/SpamAssassin. Unfortunately, I am still stuck on the PostFix part. I've setup a new subdomain DNS with its own A/MX ...
1
vote
1answer
781 views

SMTP server closes connection unexpectedly

I'm writing a python program to send emails, and when trying to send to yopmail, hotmail and some other hosts the connection gets closed by the server without a message. I tried connecting directly ...
2
votes
1answer
4k views

5.5.0 smtp;554 transaction failed spam message not queued

Some users are trying to send email to certain domains using Exchange Server 2003, but the message is always is rejected and the following message is shown: 5.5.0 smtp;554 Transaction Failed Spam ...
2
votes
0answers
30 views

I need to set-up the blocked machine to relay to the unblocked machine using a different port

I have two Windows Server 2003 machines sitting in a network. Server B has port 25 open and can relay emails to the local network's smtp server. Server A does not have port 25 open. How can I set it ...
4
votes
2answers
3k views

Can't connect to SMTP server

I have trouble connecting to an SMTP server from my PC. I use Debian sid. telnet mail.example.com 25 Trying 12.23.34.45... telnet: Unable to connect to remote host: Connection timed out While from ...
-2
votes
2answers
295 views

SMTP server on debian 6.0 linux

I have some questions: I am using a SMTP service for sending monthly newsletter for my website (~3000 email addresses). I was thinking: I already own a virtual server configured as a web server and ...
0
votes
1answer
390 views

What is a good third-party SMTP software for custom logging?

I am currently using IIS 6 SMTP to send out some of our mail and I unfortunately amn't finding the logging performed by it to be verbose enough - nor am I able to customise it to the level I would ...
0
votes
2answers
531 views

Postfix port 25 unavailable

Is there a condition or state that Postfix can enter that will prevent connectivity on port 25? Am using Javamail to send to postfix as the local MTA, which works about 99% of the time. However, I ...
3
votes
3answers
1k views

How to force Windows Server 2008 R2's SMTP server to generate NDRs for non-existing local users?

I have a Windows Server 2008 R2 server with the SMTP service enabled, which provides mail relay to another server for some applications. Sometimes, a message comes in with a wrong "To:" address, ...
2
votes
1answer
845 views

Does snmpd support SNMP monitoring of SendMail queues?

CentOS 5.7 | SendMail 8.14.x I've got a CentOS box running snmpd and I'd like to monitor sendmail queues. Is this natively supported by snmpd or will I need to do something special to monitor it?
0
votes
6answers
1k views

MX record, different mail and web server

My domain(www.site.com) is hosted on a webserver running cPanel. My mails are handled by my ISP's server. To retrieve my mails, I use the following setting given by my ISP: pop3.isp.com smtp.isp.com ...
4
votes
2answers
4k views

Postfix, saslauthd, mysql, smtp authentication problems

Trying to get authentication on my mail server (ubuntu 10.04) running but am having trouble. I have a server with postfix for smtp setup, imap server with courier setup. My postfix authentication is ...
2
votes
1answer
597 views

Nginx Ubuntu Postfix Config - Can't connect to incoming IMAP server 'server not responding' but can send mail via outgoing using same details?

I'm pretty to new server admin and especially nginx but seem to be getting ok fine apart from accessing my mail via my iPhone? I've changed my domain to 'domain.com' The thing is I can send mail ...
0
votes
2answers
1k views

SMTP Unreachable from Specific Networks

I host my business site through a VPS account. The instance runs Ubuntu and I'm using POSTFIX+Dovecot as my mail server. For the most part, the mail server works fine. I have noticed, however, that I ...