Refers to the hardware or software that make up a server dedicated to sending and receiving emails. Many popular modern email servers bundle other functionality for contacts and calendaring along email delivery.

learn more… | top users | synonyms (2)

0
votes
0answers
33 views

Virtual and system mailboxes - how to set passdb propperly

I've just configured email on my server. Gentoo, Postfix, Dovecot, Amavisd, ClamAV and Spamassasin I am using LMTP for delivering virtual mails, works great. I am using standard postfix deliver ...
0
votes
2answers
140 views

Gmail as stand-by mail server for Exchange for incoming emails

How to configure MX zones to utilize Gmail/Outlook as stand-by incoming mail server with my active Exchane to provide reliability? Gmail/Outlook should only be used in case of Exchange is ...
1
vote
0answers
131 views

Postfix configuration with DKIM to send mail from multiple domains [duplicate]

My current setup is a Postfix installation configured with DKIM on a server with hostname prod01.example.com The server is used to send out mail on the form webshop@example.com, ...
0
votes
1answer
113 views

Email sent from my new server, being suspended by SMTP because “weird” hostname?

I have some problems sending emails from my server: I've been banned/suspended for abuse (IP blocked) by the SMTP server. This happens only on my new virtual server. Right to the question: is my new ...
1
vote
1answer
30 views

Hierarchy of Scanning Outgoing Mails on a Secure Email Gateway

Good day. Can anyone help me determine what could be the standard hierarchy of scanning outgoing mails on a secure email gateway (regardless 9f the vendor)? Should mails be scanned by policies before ...
1
vote
1answer
111 views

Where do I add DKIM details to amavisd.conf on Ubuntu?

I'm trying to add a DKIM key to an additional domain on my Ubuntu mail server, I am trying to add the following block of code to the amavisd.conf file $enable_dkim_verification = 1; ...
-1
votes
1answer
2k views

Unable to connect to GMail SMTP server [closed]

I'd like to send some emails with my gmail account and nodemailer. Locally, it works fine, but not in my server. $ telnet smtp.gmail.com 465 Trying 74.125.29.108... Trying 74.125.29.109... Trying ...
1
vote
1answer
65 views

Emails in a VPS solution [closed]

A little of my own background, I'm a webdeveloper and used to the likes of shared hosting, at my new job I have become accustomed to working with our own servers (running CentOS) and the Linux ...
0
votes
2answers
318 views

Postfix reject client from domains without MX records

Machine mail.domain.com send email for domain.com through Postfix 2.11 but today reviewing mail.log file i noticed some Wordpress on machines wordpress.domain.com and blog.domain.com as sending email ...
0
votes
1answer
94 views

Random synchronization error on SMTP server

We can send mails across the network from 1 server to another via a centralized smtp server. However, the we get a synchronization error on the server randomly. So for example if we send a simple ...
1
vote
1answer
123 views

SMTPD restrictions

i'm looking for a bit of advice on Postfix restrictions configuration. I'm looking for a balanced configuration which properly rejects spam and unauthorized access retries. Lately, i've been reading ...
1
vote
1answer
143 views

Postfix regexp map for mailboxes

I need to forward all email that comes to mailbox by some mask to one specific mailbox. For example if recipient mail is 79001234567 it should be forwarded. line from /etc/postfix/main.cf ...
0
votes
0answers
113 views

SASLAUTH: Temporary block on more than 5 authentication followed failures

I'm running a Postfix MTA together to SASL when it comes to authentication. Yesterday saslauthd collapsed and none of the email users could login to the mail server. What i think is probably ...
0
votes
2answers
725 views

How to stop or prevent Postfix / smtpd / Sasl brute forcing

There are numerous attempts to connect to my mail server in order to send mail either unauthenticated or to guess username and password to, I suppose, accomplish the same. Should I fight against ...
0
votes
1answer
121 views

PHP Forms - Web Hosting and Mail Hosting on Different Servers

I used to have a website with GoDaddy but wasnt happy with their service, so I transferred my website to a new host but kept my domain and emails with GoDaddy. Basically i changed the A ...
0
votes
1answer
1k views

Postfix alias [user unknown] issue

So I need to create an alias on my postfix server that will redirect all mail to multiple email addresses. I have postfix + postfixadmin with dovecot up and configured and everything seem to be ...
1
vote
0answers
85 views

Debian exim4 rate limits

I try to limit on exim4 the outgoing mails per day per domain, i found this: acl_check_ratelimit: accept authenticated = * endpass ratelimit = 40 / 1d / per_rcpt / ...
0
votes
1answer
103 views

Where does e-mail header “Received: from…” come from? [closed]

I sent myself an e-mail from my server to my gmail account, here is one of the headers (partially redacted): Received: from cpvds3xx.xxx.com (dev1.xxx.com. [209.51.132.xxx]) by mx.google.com ...
1
vote
1answer
751 views

Dovecot creates folder, Postfix expects file

I have tried configuring a Postfix/Dovecot combo with virtual users using this guide. My server is running Postfix 2.6.6 and Dovecot 2.0.9 on CentOS 6.5. The problem is that when I connect to the ...
0
votes
1answer
66 views

Is extra “Received by” in mail headers bad and can I remove it?

I use our own VPS web and mail server to send out a newsletter regularly to 50,000 addresses. I am trying to improve deliverability and was looking through some of the thousands of bounce emails. One ...
0
votes
1answer
70 views

Conditionally prepending a string to mail subject in Exim4

I have a custom solution for implementing mailing lists using only Exim4 and a SQL database. Basically, most of the hard work is done in a single router, which checks on various conditions, does ...
0
votes
2answers
1k views

Postfix: bouncing mail (reverse DNS issue)

I have a problem with Postfix. I get this with some email address: to=<mail@domain.tld>, relay=mail.domain.tld[IP_ADDRESS]:25, delay=3, delays=0/0/2.5/0.52, dsn=5.7.1, status=bounced (host ...
0
votes
1answer
708 views

Having Trouble Setting Up CentOS Email Server

I'm having some trouble setting up a mail server on CentOS, as of right now, nothing is getting sent at all and I'm not entirely sure why, I've tried a few guides, but none of them seem to explain ...
4
votes
1answer
72 views

Where is the email bounce sent? To the @domain or to the IP that sent it?

When I send an email from noreply@mysite.com to user@yahoo.com and I use that VERP bounce format like bounce+user=yahoo.com@mysite.com Is this bounce back sent to the mail server in DNS records of ...
3
votes
2answers
1k views

Is it ok to use self-signed certificates for smtp transport?

By "by ok to use" I mean: are MTA agents receiving emails from my server going to reject my email if not, are they going to make other kind of bad treatment for my emails (marking as spam, unsafe ...
0
votes
1answer
139 views

Limit maximum number of destination addresses

One of my clients sends e-mails from time to time that are categorized as spam due to the large number of destination addresses used in the "To" field. The problem is that it does this very often ...
1
vote
1answer
429 views

Citadel 550 Invalid recipient

I tried to install citadel on a debian squeeze machine. So far, what I've done is : install citadel from the repo create a user testuser & assign it the address testuser@mydomain.com Add 2 mx ...
1
vote
0answers
161 views

Postfix performance and how to increase my throughput?

What I've read so far: Postfix Tunning Postfix Bottle Neck Analisys The Book of Postfix (chapter 22) I have similar specs to this guy but I'm only able to send about ~1300 emails/hour What I've ...
0
votes
1answer
515 views

Contact sender via Postfix Mailer-Daemon on “Bad recipient address syntax”

I would like Postfix to generate and contact via Mailer-Daemon the sender recipient when the following case occurs Bad recipient address syntax. I've been reading through Postfix docs but haven't ...
0
votes
0answers
145 views

Undeliverable SMTP email not saved to badmail folder using IIS6.0

I am testing my SMTP virtual server hosted in IIS6.0 to verify that when an email cant be delivered and cant be sent back to the sender, then I need to see a copy of the Non Deliver Report in the ...
0
votes
1answer
80 views

exim4 not sending email as intended [closed]

I am setting up a server that needs to be able to send email from my email account that I have through my hosting provider "JustHost". I have been trying to get it to work with internet and smarthost ...
1
vote
1answer
357 views

Can't send mail using mail() PHP - 555 sorry, too many emails

Since this morning, I can't send mail from my Ubuntu server. I use PHP and Msmtp, I looked at the Apache logs, and found: msmtp: authentication failed (method PLAIN) msmtp: server message: 555 sorry, ...
2
votes
1answer
909 views

How to stop double-bounce FROM sender in postfix

I am getting huge amount of these in my mail log, and unable to find its originator. What could be the reason? Here is log entry: postfix/cleanup[9626]: 4413082E40: ...
0
votes
1answer
40 views

including an external file in postfix aliases file using “:include:” directive

Some entries in my postfix alias file are static, whereas others are intended to be dynamic, and updated via a cron-job script every hour. I would like to have the static entries be in a file by ...
0
votes
1answer
298 views

hMailServer forwarding and distribution lists with SPF checking

I have installed and configured hMailServer, primarily to allow me to create a distribution list for a private organisation, and some email address aliases. This is so that members of the ...
1
vote
1answer
357 views

Sieve: filter subject with regex, file into mailbox named match

I am trying to filter mails by subject with a regular expression. The subjects I want to match are read like [git-foo] some more text where foo is the string I want to check for. I end up with the ...
0
votes
2answers
2k views

Postfix: Helo command rejected: Host not found

i have a Postfix 2.9.6 running on Ubuntu with the following configuration https://gist.github.com/anonymous/400fb4afa05e18c6da2b and i'm suffering the following issue where a valid client tries to ...
0
votes
0answers
82 views

OpenDKIM: no MTA name match (host=myhost.mydomain.com, MTA=myhost.mydomain.com)

i'm using OpenDKIM together with Postfix MTA and while DKIM solutions is working well but in /var/log/mail.log i can see opendkim is complaining about OpenDKIM: no MTA name match ...
0
votes
2answers
547 views

Domino always server fails to send SMTP email at first attempt

In our logs, we find the below: Router: No messages transferred to fakedomain.com (host mx.fakedomain.com) via SMTP: The server is not responding. The server may be down or you may be experiencing ...
0
votes
3answers
107 views

How to forward a mail server without MX records?

My company is switching from an old clunky dedicated email server (which we can't maintain anymore) to Google Apps email, and we'd like to start using the Google email now, as the old server regularly ...
1
vote
2answers
2k views

lost connection with mx.servername while performing the HELO handshake

I am new to administering a mail server so I am at a loss when the mail server can send to certain emails like gmail, telus, and shaw but not other email addresses. Just specific ones I guess. Here is ...
-1
votes
2answers
37 views

Database back end for mail serrver

Hi I need to build a front end a mail server and my experience is limited to Dovecot, which I believe doesn't have support for storing mails in databases. So just thinking how users will be ...
0
votes
2answers
250 views

Linux exim send-only mail server with NO domain

I'm not sure I understand the whole principle behind what is needed for a mail server so I need some clarification and have some questions. I am trying to setup a mail server on my personal server ...
0
votes
1answer
254 views

Postfix: Reject reject_unknown_recipient_domain and receive instant email notification

when an email is sent to a non existing domain or recipient, i would like the sender to receive an immediate email from mailer-daemon informing the recipient does not exists. Actually, what happens ...
-2
votes
2answers
68 views

Email disappears in OWA [closed]

i have an hosted exchange 2013 server, with 2 emails address configured in POP on thunderbird. But my email disappears in OWA after reading them in thunderbird. Why?
1
vote
1answer
94 views

postfix virtual aliasing between two domains hosted on the same mailserver

The situation: I have two domains: domain.pl and domain.com. I configured two emails tom@domain.pl and jerry@domain.com. I also have SSL certificate valid only on ssl.domain.com. The problem: I want ...
0
votes
0answers
23 views

Sensible approach for delegating mail delivery for a domain

Before I begin, I want to apologise for possible bending rules of this QA site, since this question does not fall under category of a specific problem that demands straight answer. It is rather a ...
6
votes
1answer
209 views

Should I listen for SMTP on both 25 and 587?

I was setting up haraka as our mailing server, and for outbound email, it suggests moving to port 587 for SMTPS auth support. However, I'm unsure if I should be running 2 instances of haraka on ...
0
votes
1answer
544 views

How to set up reverse DNS on Ubuntu 12.04 VPS

As far as I can remember when setting up my VPS and mail server on it, I had configured the mail server correctly. However, a few of my clients get SMTP errors, host mx1.zonnet.nl[62.58.50.9] ...
0
votes
1answer
307 views

Postfix dovecot remote mail client connection

I am stuck in the following issue for like hours. Hopefully someone can help me out this one :x.. I set up a mail server to receive and send e-mails. receiving by imap. The problem I am facing is as ...