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.

learn more… | top users | synonyms

0
votes
1answer
5 views

Postfix Domain Whitelisting in Combination with Sender Authentication

I'd like to whitelist several domains in my Postfix configuration in such a way that all e-mails from those domains are accepted as long as they're properly authenticated using SPF and/or DKIM, should ...
0
votes
0answers
23 views

SMTP retry interval - Lotus Domino

Our ISP only accepts 5 emails per transmission. If I do a manual send (route *), then I usually get the error: 57 Retry( 2) SMTP [$Retry MY_ISP.COM] (Push) Last error: 421 4.4.2 Message submission ...
0
votes
2answers
666 views

SMTP server rejects connection without SSL enabled

Setting up a new CentOS 6 server with Plesk 10.4.4 using Postfix, I am unable to send emails from any user account on port 25, 465, or 587 without having SSL enabled. If I check to use SSL in Apple ...
1
vote
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 ...
0
votes
2answers
24 views

SMTP don't work when try to send mail from mail clinet

Mail server works fine when send mail from server, but when I use some mail client it not work. I found this in logs: Jul 12 19:45:04 tvsite postfix/smtpd[3356]: warning: hostname adsl-bb29-l44 does ...
0
votes
1answer
27 views

EXIM - 550 Cannot receive from specified address - Sendgrid

We're having some intermediate issues with exim where some emails go through and then others get the 550 Cannot receive from specified address Error. This is the guide we used to setup EXIM: ...
0
votes
1answer
47 views

In SMTP with BINARYMIME format, can “Data” be used instead of “BDAT”

I have an IIS 7 server that is rejecting the following command, however when I use a non IIS server this is accepted. The Error is: 503 5.5.2 Body type BINARYMIME requires BDAT Based on my reading ...
0
votes
2answers
19 views

Remote IP and SMTP Proxy

Is it possible to proxy emails - with postfix for example - transparently so the backend mail server will get the last SMTP server IP address (rbl purpose) and not the Proxy IP address? If it is ...
3
votes
3answers
54 views

Will mailing lists “break” if SPF is too restrictive?

I have recently configured my own mail server (Linux-based postfix + dovecot scenario). This is just for personal use - I have no bulk mail going out, no automatically generated mail outbound from the ...
2
votes
2answers
4k views

What might cause a user to receive duplicate emails?

One of our customers is receiving duplicate emails from our application, even though as far as I can tell from the application and SMTP logs, we're only sending it out once. What are some of the ways ...
0
votes
2answers
37 views

View realtime list of connections to Postfix

I am running Postfix on a linux box with a couple hundred local users with mailboxes. Is there a way to monitor all incoming connections (SMTP) to the Postfix service? I.e. a live stream of "IP ...
0
votes
1answer
1k views

554 5.7.1 <mail_addr>: Relay access denied centos postfix

I have problem in send mail from postfix in centos I have following setup mail server postfix for sending mail but I am getting error. As in the link I tried following commands telnet localhost ...
4
votes
5answers
4k views

Outgoing only SMTP server

I want to setup an outgoing only SMTP server on Debian, so my Web-applications will be able to send e-mails via it. I don't want to use another hosts because of security and customizability of my own ...
0
votes
4answers
142 views

Postfix setup on AWS EC2 using SMTP relay

On ec2 instance, the IP is dynamic, and if I want to use third party SMTP gateway such as sendgrid, what is the suggested values of the following fields? myorigin myhostname mydestination Assume ...
2
votes
3answers
988 views

How to send mails using a custom .NET application and Windows authentication to a distribution list that only allows authenticated senders?

This is basically a cross post from my StackOverflow question to see if I can get a server side perspective. I'm trying to send automated emails from a C# console application from machines to clients ...
0
votes
0answers
28 views

drop smtp live connection

So the problem is that I think my server got DDoS attack with SMTP packet (my mail server). What I can see is that the attacker abuse the smtp_connection_cache. The attacker keep connections (smtp) ...
-1
votes
0answers
22 views

OpenSMTPD does not deliver mails to MX without TLS

My OpenSMTPD trys to deliver a mail, which i sent locally from the system. But it stops transmitting when tls is not available on the target mx. Jul 4 12:44:50 troll smtpd[4229]: smtp-out: ...
0
votes
1answer
18 views

smtpdiag tool lists wrong mail servers

I have a weird issue on a server. When i run the smtpdiag tool, it lists the old mail server settings (with mx servers being website.com & mx01.1and1.com). here're the results Checking MX servers ...
-3
votes
0answers
23 views

How to test connection to Google mail server? [closed]

For example, google mx records for gmail is ALT1.ASPMX.L.GOOGLE.com I've tested all common smtp ports (25, 2525, 465, 587) and does not work. Any idea?
0
votes
1answer
21 views

RoundCube SSL SMTP Failure

I've set up a roundcube installation on my website that works great when using SSL for IMAP and non-ssl for smtp. The only problem is this: when I switch to using ssl://smtp.[mydomain].com for my ...
0
votes
2answers
157 views

SMTP / HELO and RBL black listing

We've been having many issues with our external IP address being put on RBL's and blacklisted. We are using a 3rd party, hosted SMTP e-mail and we have two locations using it. Our TLD is ABC.com. ...
0
votes
1answer
96 views

Incoming hotmail connections timing out with TLS enabled

Okay, this has me completely baffled. I have tried many things to fix this but I'm at my wits end. At the start of June, the server which I maintain suddenly decided to stop accepting incoming TLS ...
7
votes
7answers
26k views

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 ...
2
votes
1answer
928 views

Bugzilla : No SASL mechanism found

I am using Bugzilla on windows 7. I am using the unofficial Bugzilla installer. I followed the steps accordingly and gave valid credentials wherever required. I open Bugzilla and try to create a new ...
3
votes
1answer
3k views

nginx as smtp proxy

I was ordered to configure nginx as SMTP proxy. That's all details I have. I've looked though some books and docs and don't see neither any examples of such configuration nor explanations of why this ...
2
votes
1answer
49 views

How can I enforce TLS in sendmail when I don't necessarily know the hostname of the downstream MTA (only IPs)? [e.g. by recipients' domain]

I'm running SendMail 8.14 and have some custom static routes for sending to certain domains. These domains are "internal" but not managed directly by me. Here's an example of ...
0
votes
2answers
68 views

What should I set in postfix's myhostname / mydestination?

I am using Ubuntu, on a web server need to send out email (via sendgrid), this server never receive any external email, and I've the following hostname settings /etc/hostname = example /etc/hosts = ...
0
votes
1answer
456 views

Postfix on Ubuntu tried everything, won't send emails

I'm trying to get postfix set-up on Ubuntu 13.04 but no luck so far. I found a few answers here on ServerFault that didn't work. I re-installed a bunch of times, nothing. This is my first time dealing ...
0
votes
1answer
671 views

postfix smtp_get: EOF

I'm using postfix (incomming port 25) + SpamPD (127.0.0.1:10025 relayhost:127.0.0.1:10026) for filtering incoming email, which are coming from internet for my remote MTA. MTA which holds virtual ...
0
votes
1answer
16 views

Regarding Remote SMTP

I am trying to send mail using remote Gmail SMTP from my joomla website. Do I still need to install & configure MTA such such postfix for connecting to remote Gmail Servers or the joomla would ...
0
votes
3answers
278 views

Exim4 with multiple websites

I'm on Ubuntu Server 12.04 and I managed to install & configure Exim4 following this guide. I set my hostname to 'multiformeingegno.com' and my /etc/hosts looks like this: 127.0.0.1 ...
0
votes
0answers
30 views

Exim/Cpanel Email Headers

We have been trying to figure this out for a few days now and have been all over this board as well as a few others, and this refers to Received From and X-AntiAbuse: Primary Hostname headers. We are ...
0
votes
1answer
23 views

Send email from main domain using exim4

I've installed exim4 on my server to send email for server messages, registration messages, lost password messages etc. My server's FQDN/rDNS is mail.example.com, which I also entered during the ...
0
votes
1answer
24 views

how to provide username and password for ansible mail module

How to provide username and password of email account while using ansible mail module. I'm using gmail smtp server. In documentation of mail module nothing is mentioned about it. I also came across ...
4
votes
2answers
2k views

postfix sasl “cannot connect to saslauthd server: No such file or directory”

I try to setup postfix with smtp authentication. I want to use /etc/shadow as my realm Unfortunately I get a "generic error" when i try to authenticate # nc localhost 25 220 mail.foo ESMTP Postfix ...
4
votes
3answers
84 views

How to limit amount of email sent by postfix to certain domains and control it by using mail header?

Goal I'm looking for a solution to limit rate of e-mails sent to specific e-mail operator (several Top-Level domains, all of them I know) on hourly basis. I also need some way to control the rate on ...
2
votes
1answer
82 views

5.7.1 SMTP error when running stored proc using DB Mail in SQL Server 2012

I am getting an error in SQL Server 2012 Database Mail when executing a stored proc to send an email from a specified address to a specified address using Office 365 as the SMTP server. The mail ...
0
votes
1answer
690 views

SMTP 550 5.1.1 error when sending email with postfix via amazon SES

I've been following this manual starting at page 26. First I've already made a tunnel with stunnel, and also I've already got conected via command line with amazon servers, then in my postfix main.cf ...
1
vote
1answer
28 views

SecAst: Configuring Email Alerts for Google Apps Account

Requesting assistance with configuring SecAst email alerts to work with Google Apps hosted account (posting here as per request by Generation D)... We have SecAst installed on a system with a new ...
2
votes
1answer
1k views

apache sendmail: trying to change user “from” address from apache to domain account

I apologize if I am asking a question already answered, but my problem isn't really that I haven't found an answer. I have, in fact, found a half-dozen different "solutions" to my problem, tried them ...
-2
votes
0answers
23 views

What Is The Comment Syntax for SMTP Script

I have a simple test script for SMTP that looks like this: helo 192.168.1.1 MAIL FROM: <me@work.com> RCPT TO: <me@gmail.com> DATA FROM: "buck" <me@work.com> TO: "me at gmail" ...
1
vote
8answers
1k views

Incoming mail from sender, MX record won't accept replies. How to block the incoming SMTP connection from that sender?

I'm administrating a mail service for a small business. They have a mail host, foo.example.org, whose internet connection is an ADSL service with a permanent IP address. Unfortunately, many mail ...
0
votes
1answer
832 views

Postfix MySql Dovecot - SMTP Authentication Failure

Hello I have a Postfix setup with Dovecot and MySql. The server is running Debian Squeeze. The MySql server is a slave that has data pushed to it from a primary (postfix) mail server(running a ...
-1
votes
0answers
43 views

Unable to send mail after installing Postfix and Dovecot

I have setup a mail server with Postfix and Dovecot in my debian server. I can send and receive messages between my users using the 'mail' command: mail user@mydomain.es but i can't send mail using ...
1
vote
4answers
2k views

Help! Linux server under SMTP SASLAUTHD attack!

My linux sendmail server is being forced out of commission by a flood of invalid smtp saslauthd logins. Steady stream of PAM auth errors logged for saslauthd in messages. I have searched and searched ...
0
votes
1answer
1k views

Postfix (delivery temporarily suspended: conversation with mydomain.net [private/lmtp] timed out while receiving the initial server greeting)

I'm running Debian 7.1, Postfix version 2.9.6, Dovecot Version 2.1.7 To set it up I followed mostly this (without the spamass-clamav-greylist bit) I have also got setup smart host relaying via gmail ...
1
vote
1answer
33 views

What are some useful email reports to monitor in an SMTP/email environment?

It's possible to generate dozens of email reports in a given SMTP environment, and I'm interested in learning what reports are common in large installations and how they are used. Examples: ...
0
votes
2answers
208 views

postfix remote received header

I have two servers SERVER -1 (S1) and SERVER -2 (S2)(Based on centos 5 + Postfix). S1 contains my software and S2 is a SMTP. S1 submits mails to S2 and S2 mails to REMOTE STMP. Received mail show ...
0
votes
1answer
25 views

Postfix Regex Alias with Text Substitution

I'm migrating from an older email structure ([first letter of first name].[last name]@company.com) to [first letter of first name][last name]@company.com. To ensure that mail sent to older addresses ...
0
votes
5answers
58 views

Do most SMTP servers support SSL? [closed]

I'm working on an application that has to be able to send out emails with potentially sensitive information. I was wondering if there's any data on what SMTP servers are typically used in a corporate ...