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.

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1answer
18 views

What might be using my smtp port on a new CentOS machine?

I'm trying to setup a simple email server using node smtp-server. I'm the only one that's ever accessed the machine (a CentOS 6.5 box on Digital Ocean), and I've only set up 2 http servers. I'm ...
-4
votes
0answers
32 views

How to turn on SMTP server on windows without depending on IIS? [on hold]

I am trying to find a way to enable/configure SMTP server on my windows 2008 R2 server. I would like to eventually have a php script that connect to this service/read/send emails. I found an ...
-3
votes
0answers
16 views

How can I open my email server to open registration? [on hold]

So I'm curious on how to open my webmail server to the public as an experiment. I have a standard mail stack, with Postfix, Squirrelmail, SpamAssassin, Dovecot and the like. I don't intend to run a ...
1
vote
0answers
8 views

Is DMARC helpful to me if I don't need reporting?

I have SPF and DKIM setup and working for the email domain I administer. The next recommended step is to setup DMARC since SPF and DKIM are both in place. What are the benefits of using DMARC if both ...
0
votes
1answer
28 views

Logwatch postfix report. Where does this “Deferrals” come from and how to stop it?

I'm using logwatch to monitor the logs on my server and I'm trying to make sense out of the postfix report. (See the report below.) By looking at /var/log/mail.log I saw that this mail seems to be ...
-5
votes
0answers
29 views

postfix can sent mail but donot received with aws [on hold]

environment: i am using aws . and install sentora hosting panel , and the also option for email .they are using postfix with round-qube in front-end . my Problem : i am creating email account ...
0
votes
2answers
51 views

Dovecot is not working

I'm having a server. The server information I've given below. Linux host.com 2.6.32-531.29.2.lve1.3.11.1.el6.x86_64 #1 SMP Thu Dec 18 06:49:17 EST 2014 x86_64 x86_64 x86_64 GNU/Linux When I was ...
0
votes
0answers
32 views

Postfix Clogging Up

I have an OS X mail server running using server.app. In the background, it runs Postfix. Recently, my mail queue has been clogging up and I'm not quite sure why. I'll try to force the queue with sudo ...
-1
votes
1answer
38 views

Seperate web/mail server, mailserver won't receive emails [on hold]

I have a basic set up: VPS Mailserver Domain Management This is my first experience setting up both a VPS and a separate mail server. My mail server won't receive emails. DNS A ...
4
votes
1answer
36 views

Why is sendmail adding an extra carriage return in headers?

I've got SendMail 8.14.4 running on a CentOS 5 server. A user in Japan is sending a message and when it gets processed by the server, SendMail is adding an extra carriage return for some reason. ...
-2
votes
0answers
41 views

Postfix / Dovecot not allowing external connections

I configured Dovecot and Postfix following https://www.digitalocean.com/community/tutorials/how-to-configure-a-mail-server-using-postfix-dovecot-mysql-and-spamassassin However, I am unable to connect ...
-1
votes
1answer
34 views

Dovecot-core fails to start

I am attempting to follow this tutorial: https://www.digitalocean.com/community/tutorials/how-to-configure-a-mail-server-using-postfix-dovecot-mysql-and-spamassassin I believe someone before me ...
1
vote
1answer
19 views

exim: How to reject spam mail depending on destination domain

Currently, I have exim set up to mark spam mail, and reject spam mail with high scores, using these ACL instructions in the acl_smtp_data ACL: warn condition = ${if ...
0
votes
0answers
8 views

hmailserver not receiving any email

I followed all setup instructions and also probable know issues page but nothing helps. I have checked that hmailserver has a correct public hostname same as found in the mxrecord within our ...
-1
votes
1answer
36 views

Email Going Missing

I've setup Postfix for email delivery on a client's server and made sure that our PTR records, SPF, and reverse DNS is all configured correctly. As far as I can tell, we're doing everything correctly ...
1
vote
3answers
78 views

How much overhead does having infinite email aliases cause on the email server?

I was wondering if allowing users to have infinite number of email aliases have much overhead on the email server. For example, my mail email address could be vlad@vladmail.com but I could also use ...
0
votes
1answer
50 views

Fixing invalid DNS records for mail server with SSL certificate

Ok, so the question name is a bit weird but I wasn't quite sure how to word it. I have a machine with the hostname foo.example.com with an SSL certificate for the domain mail.example.com. I have also ...
-1
votes
0answers
14 views

gmail is filtering mail from my server to spam [duplicate]

I am really stuck here and connot find away around this gmail spam filter. Just some things that i have done: checked blacklists (not on any) Adding SPF Recoards (working) Adding DomainKeys & ...
0
votes
1answer
28 views

Sendmail sends unsolicited emails [duplicate]

I have a problem with sendmail. All of the sudden it started sending emails that its not supposed to send (obviaou spam messages about viagra, porn etc.). I checked some tools that supposedly check ...
1
vote
0answers
29 views

Exim Email hacked or Backscatter attack

I have undertaken an Exim Server for a client, this morning I Woke up to about 100 bounce backs from Hotmail with the following: "Undelivered Mail Returned to Sender" Googling I have come across ...
1
vote
0answers
17 views

Mail Server Memory buffer error

From time to time, my mail server stops sending any new mails. When this happened, I find the below error log, Jun 22 23:10:18 myserver saslauthd[3967]: DEBUG: auth_pam: pam_authenticate failed: ...
-3
votes
0answers
31 views

Postfix - ability to send mail from alias address? [migrated]

I have a mail server with Postifx (and dovecot) setup, on which there is an alias address (say alias@example.com) which forwards mail to my main email (myname@gmail.com). This works fine, and all mail ...
0
votes
1answer
30 views

Sending an email to multiple recipients via a mail relay, while hiding the recipients

Our software sends emails using Exchange. Typically each email foes to multiple recipients and we just send one email with multiple "to" addresses. We're moving to an SMTP-based email relay, where we ...
-2
votes
1answer
32 views

Is it possible to make me send an email by opening a malicious email? [closed]

I know I don't have much info on this problem/question so I will delete if everyone downvotes or votes to close/delete. Is it possible for someone to make an email look like I sent it simply by me ...
0
votes
1answer
55 views

How to add allowed relay IPs for Windows SMTP using command line or script

I have a long list of IP addresses I need to add as allowed relays to the built-in SMTP service on Windows Server 2008 R2 (IIS 7.5, but SMTP uses the old IIS 6.0 manager) I know how to add allowed ...
0
votes
1answer
28 views

Postfix dynamically set Relay Host [duplicate]

Does anyone know of a way to dynamically set the relay host when sending mail through Postfix? At what point does Postfix set the relay host? Is there some way that I can tell Postfix to use a relay ...
1
vote
0answers
25 views

IMAP Proxy for a Server on Windows 7

I have configured a set-up of Hmailserver and Horde Groupware Webmail Solution on my test server which runs Windows 7. Everything is up and running smoothly but I'm encountering two minor issues: In ...
2
votes
1answer
28 views

How to make Postfix skipping some recipient's hosts as unreachable?

I would be really happy to learn how to make Postfix to "remember" that certain host is unreachable at the moment, so it would be good if we didn't perform any new connection attempts to this host for ...
0
votes
1answer
78 views

Hmailserver and Outlook 2013 can send but not receive any emails in POP3 or IMAP

I'm having problems receiving any email from outlook. I can send email through smtp using comcast (my isp) without a problem, but I can't receive any email using either personal pop3 configured in ...
1
vote
1answer
21 views

Exim4 intercept all outgoing mail

I have a LAMP stack set up on a Debian 8 (jessie) machine. I'm trying to find a way of intercepting all outgoing mail sent by PHP (through sendmail) and instead of sending it out, deliver it to my ...
0
votes
1answer
47 views

Outbound SMTP email not being delivered, but still disappearing from the queue and pickup folder

After setting up my smtp server on a Windows 2012 server r2 on port 587. I tested the email functions by creating a text file labeled email with the following code inside: From:admin@mydomain.com ...
0
votes
0answers
26 views

Figuring out why prodigy.net DNSBL is flagging me? [duplicate]

For the last 10 days, I've been unable to send mail to sbcglobal.net addresses from brinckerhoff.org (192.81.130.145). The responses from the sbcglobal.net MX (which turns out to be a prodigy.net ...
5
votes
2answers
194 views

Is there a graceful way to pick up new changes in sendmail?

Is there a graceful way to have Sendmail reload/process configuration changes from sendmail.mc without completely restarting services and potentially impacting smtp delivery that's in progress at that ...
2
votes
1answer
59 views

is there any way for MS-TNEF headers to be added to email in transit or receipt?

My coworkers have been complaining about receiving email from a certain company without formatting. I see the formatting just fine. Digging in, the differences appear to be that I receive email that ...
1
vote
1answer
48 views

Postfix behind a relay to handle incoming and outgoing mail with /etc/aliases

I'm trying to setup postfix on a Linux machine (Debian 8 with Postfix 2.11). But I have some troubles getting /etc/aliases to work correctly. The setup is as follows: A MS Exchange server is the ...
0
votes
1answer
20 views

How to resolve “Domain shares an MX record (mx2.zoho.com) for a mail exchange which will not accept mail to the administrator”

I have found one of our domains on a spam list, http://rfc-clueless.org/. It states that: RFC2 is not a spam list. Each of our curated lists track compliance with specific requirements of RFCs ...
-2
votes
1answer
67 views

Postfix setup for LAN only [closed]

I have Ubuntu on which I installed Postfix. Postfix packet is up and running. I'm trying to make a simple e-mail system to work between a few LAN computers. Basically, I need to have some outlook ...
1
vote
1answer
46 views

Mails not being received. status=deferred (lost connection with 127.0.0.1

I have a MiaB box with about 30 email boxes. This errror pops up in /var/log/mail.err but with no other information. WARNING! Error in process_request eval block: /usr/sbin/spampd: write error ...
1
vote
1answer
49 views

PTR Record setup with separate incoming and outgoing servers [duplicate]

The situation: Even though SPF, DKIM, and the entire mail formatting is optimized to score 10/10 on mail-tester, many outgoing mails are marked as spam in yahoo and outlook. The primary server sends ...
1
vote
1answer
36 views

Dovecot reports no SASL authentication mechanisms

On my way to setup a mail server with Postfix and Dovecot on Ubuntu, I can now send mails to other domains. However, I cannot receive from others. In the logs it reads Jun 14 09:34:35 ...
3
votes
2answers
110 views

Is setting up my own SMTP server to send email a waste of time with regards to deliverability?

I have a dedicated host serving a few domains I manage. I host my own email and IMAP server. The server is at buildoneforme.com with IP address 144.76.81.247. I think reverse DNS is working: $ host ...
1
vote
0answers
21 views

IP Blackliste with CBL for 'HELO' command? [closed]

My Setup: cPanel w/ Centos + CloudLinux 6 EXIM. suPHP. PHP 5.5. 'prevent 'nobody' user from sending..' enabled Other Enabled Settings: CSF firewall (SMTP tweak enabled), CXS, suPHP, mail header ...
2
votes
1answer
38 views

Outlook Autodiscover Protocol Updated? (or broken?)

I have set up email autodiscovery on a non-Exchange email server per [this technet article][1], and when testing with Outlook 2015, it does not work. Outlook hits the server multiple times, ...
1
vote
1answer
44 views

Email Autodiscovery Not Being Probed By Android

Android's default email client is supposed to probe the server for the domain of the user's email address per outlook autodiscovery. This bug seems to indicate that at least the first two steps of ...
0
votes
1answer
16 views

Mailman not integrating with postfix properly

I installed postfix on my local machine and able to send mails to local users i.e. shivams in my case which is username of the account. Also i am able to send mail outside of my machine for ex. ...
0
votes
0answers
26 views

Mailserver complains about reverse DNS lookup on my Gateway

I am presented a mail server setup, that is working well. There's only a small issue, which makes me think, there's something wrong in the DNS setup. It is a small setup with a Debian mail server ...
1
vote
0answers
93 views

Unable to send email via Postfix SMTP via Mac Mail App

I installed a SMTP server with Postfix as mail agent (on Ubuntu 12.04). Config is as follow: $ postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no ...
0
votes
0answers
76 views

Mail spam error while sending mails using Gmail id via Postfix hosted on Amazon EC2 server

This issue is related to using my own SMTP server to send email by any user mail id like some other mail APIs do e.g; Amazon SES, MailChimp. I am using Postfix as a mail server for my applications. I ...
0
votes
0answers
70 views

530 5.7.0 must starttls command first

I have installed postfix and davecot into my server. And I tried to test it to send email. But I got the error message: 530 5.7.0 Must issue a STARTTLS command first after telnet localhost smtp, ...
-3
votes
1answer
22 views

postfix check user database to prevent forged address

Please check sample spam mail Hello: We are facing problem with our mail server. We have two server for mail system, one is pop only (Dovecot installed) and another one is SMTP (postfix, amavis, ...