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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4
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1answer
32 views

Perfect Forward Secrecy (PFS) for mail servers

Perfect Forward Secrecy is an important enhancement to SSL/TLS communications, helping prevent captured SSL traffic from being decrypted even if the attacker has the private key. It's easy enough to ...
-1
votes
0answers
15 views

VPS hosting mail server reputation [on hold]

Is there any way to validate a (not fully) managed vps hosting mail server reputation? How can I test a hosting provider for this particular purpose? Is there some forum or website online where I can ...
0
votes
1answer
22 views

Postfix - Need to log email and then redirect to same user different domain

My goal is to add emails to a DB and then send them on to the user at a different domain. My mail server is hosted elsewhere using my domain, (me@example.com). TO get this working, I set up postfix ...
-7
votes
0answers
27 views

Google Compute Engine Email Hosting [on hold]

It's well-published and unfortunate that Google blocks outgoing connections on the SMTP ports 25, 465, 587. The recommended solution in order to send emails is to route it through SendGrid. But this ...
0
votes
1answer
36 views

Receive emails at gmail and also at my hosting service [on hold]

My current domain already has its MX records pointing to Gmail. I am developing an application that will need to process emails, but I do not want to use one more of my free gmail accounts for this ...
0
votes
1answer
47 views

Postfix forward incoming emails to mailin

I've setup the smtp server using postfix with dovecot on mail.example.com server running on port 25. And then I've also setup another smtp server using mailin (http://mailin.io) on mail.example.com ...
0
votes
1answer
18 views

How to scan mails with amavis from other mailserver

I have two postfix mail servers mailserver1 is running amavis to scan spam and virus mails mailserver2 is running without amavis. My question is how is the smartest way to use mailserver1 ...
10
votes
4answers
856 views

Is there any way to see if the mail sent by my server was received by the recipient server?

I've sent an important email that the recipient claims it wasn't received by them. They say that they asked their IT team to see if the email was received in their server. According to them the email ...
0
votes
0answers
16 views

Exim mail not signing DKIM. Don't find whats wrong. (detailed description of steps taken)

I'd like to setup my fresh server (ubuntu) for hosting my www.bolleboos.be website and enable sending of email from my php scripts. So... I installed apache, php, mysql, ... and for the mail exim4 ...
0
votes
0answers
11 views

POP and IMAP proxy merging multiple backends

Is there any IMAP+IMAPS + POP3+POP3S proxy available for Linux which can merge multiple backend servers for a single incoming request ? I'm wanting to set up a mail system distributed between 2 ...
-3
votes
0answers
26 views

How to import raw ascii email? How can i put them in the right place or at least visualize [closed]

I really need your help. On 11/12/2014 i have transferred my website to another host. I save a backup from Plesk Panel and then i logged into the new hosting, it is Cpanel. I cant import or anytihgt i ...
0
votes
1answer
20 views

Sending bulk / single emails from a single domain [duplicate]

Let me explain our situation: We have a web application that uses subdomains for each customer instance: customer1.example.com customer2.example.com Every instance can have over 500 users, which ...
0
votes
1answer
14 views

Using two mail servers simultaneously for different email ids and same domain [closed]

I am using Zoho as 3rd party email server. It's free plan doesn't allow me to create unlimited email ids. So I am hosting only some important email ids on Zoho. Now I need to add some email ids which ...
0
votes
1answer
55 views

Does PHP mail function need a mail server? [duplicate]

We recently moved our Drupal sites to a Linode server. One of those sites has a lot of users filling forms. The previous server sent, with no problem, all form registrations to an email address, this ...
1
vote
1answer
24 views

forward an exact copy of all mail to second archive mail server

I am setting up an mail server with postfix at the moment, and I am almost done with it. But I need to archive all incoming mails. My first setup was to set the sender_bcc_maps parameter and the ...
-3
votes
1answer
77 views

My server is no longer able to send emails after upgrade [closed]

I am no longer able to send emails since I updated my server from Ubuntu 13.04 to 14.04. I have several websites installed in my server, and none of them is able to send emails any more. Before the ...
1
vote
1answer
62 views

postfix multiple IP SMTP banner

I've installed postfix 2.11.3 and we have multiple IP addresses on our server which we want to host two domains, isolated and running on their own IPs. domain1 unix - - n - - ...
0
votes
1answer
50 views

Postfix MySQL Dovecot Roundcube configuration

I am in the process of setting up a mail server and I was hoping to get some help. It starts with Roundcube webmail, when I tried to login with an existing correct user name and password it gives me ...
1
vote
2answers
52 views

How do I configure Postfix to accept SMTP for local users with “@” (at sign) in logins?

I have an Ubuntu 14.04 server at mydomain.com with a bunch of users with @domain in login, like us.er@mydomain.com. Each of them has an "pseudo" account us.er-mydomain.com with the same uid, passwd ...
0
votes
1answer
43 views

Dovecot configuration

I was setting up a mail server on Amazon EC2 using postfix and dovcot and I seem to be stack on starting up dovecot service. Here is the message i got when I run Service dovecot status dovecot ...
0
votes
0answers
51 views

CentOS/sendmail = How to prevent emails from getting “defer” when sent from php mail() function? [duplicate]

I am working on a server running on CentOS (goDaddy VPS). I have WHM setup on it. And I am getting a lot of delays in emails being sent from php's mail() function. I am looking at the Email > Mail ...
0
votes
0answers
13 views

Migrating mail from Exchange to Google while standardizing addresses?

We are preparing to migrate our company email from on-premises Exchange 2010 to Google Apps for Work. We need to standardize our email addresses at the same time. User accounts have been created in ...
-4
votes
1answer
27 views

Email for openshift application [closed]

As far as I know,OpenShift (free) don't have email server (That's right?). Can I add a mx record to domain (have Cname record to openshift application) and use another server to send and receive ...
1
vote
1answer
31 views

iPhone SMTP Server errors with Regional Cell Carrier

I run an email server (CommuniGate Pro) under Red Hat Linux for our organization of about 200 employees. Many of our employees use their phones (iPhones 5 or later), to get their email. Some use IMAP ...
-5
votes
0answers
20 views

Mail Server Components [duplicate]

Lets make some assumptions. For this theroetical we are not going to worry about OS. There is a 1,000 Clients. They send 10-20 Emails a day. They receive 20-40 Emails per day. Maximum email size is ...
1
vote
2answers
32 views

Bouncing email due to bad initial MX TTL?

Last Friday night we changed mail servers. We moved off Office 365 to another hosted Exchange Solution (Intermedia.net). We use Godaddy for DNS, and after the server migration stuff was ready and ...
-1
votes
2answers
29 views

E-mail reputation using our domain as the from sent by e-mail marketer

My boss wants to send a marketing e-mail to a large group of our customers. I personally feel that it's outside of our core business and don't support it, but that's about all I can do. Normally the ...
-1
votes
1answer
25 views

How to redeliver 'Undelivered Mail Returned to Sender' in /var/spool/mail?

After changing the IP of a server that was configured as a satellite email system I missed to update mynetworks on the mail server to allow the sending of emails on behalf of the new IP address. ...
3
votes
0answers
29 views

How can I explicitly disable TLS when sending to one specific recipient?

I have a SendMail 8.14 server deployed in the middle of an SMTP workflow (Outbound mail looks like Exchange -> SendMail -> Appliance -> Internet) I have TLS configured for the first three hosts. ...
-1
votes
1answer
47 views

Dedicated server for running a Mail Server [closed]

I was wondering what kind of server(s) do I need if I want to run a mail server that handles approx 200+ email accounts with each averaging 50 emails per day? Mail server setup would be: Postfix: ...
1
vote
2answers
100 views

Is my Postfix sending spam?

In my Rsys log I am getting weird email requests that are not initiated by my server: Nov 17 09:32:18 localhost postfix/qmgr[21748]: 8E52272C09: from=<>, size=33770, nrcpt=1 (queue active) Nov ...
0
votes
2answers
72 views

Postfix 5.7.1 Relay access denied

I know there's a lot of similar questions here but none has helped me. So I have a Debian 7.0 server with postfix and dovecot working on it with a self-signed certificate. I can send emails to other ...
1
vote
1answer
105 views

SSL_accept error when mail client connect to postfix

I've managed to set up postfix and dovecot with self-signed certificate on my server. I can send and receive email using telnet command there. Now I want to connect to my mail server from a ...
0
votes
3answers
55 views

Appropriate PTR records for mail server [duplicate]

I realize this is a common question around here, but I'm having trouble understanding one part of it. I want to setup a mail server to send newsletters and other marketing emails for a few of my ...
0
votes
1answer
63 views

How to make a domain receiving email behind cloudflare?

I have a web server hosting multiple domains (centos + postfix + dovcot), one of my domain its dns is hosted on cloudflare (ie. abcd.com), but when I use gmail to send email to a user@abcd.com, ...
0
votes
1answer
20 views

Exim need to send mail off server

Never needed to set up a mail server before. I've got exim up and running perfectly fine. When I send an email using command line to my.email@gmail.com it works wonderfully, arrives from ...
0
votes
1answer
96 views

Trying to setup Roundcube using iRedmail

I'm trying to setup Roundcube using iRedmail. iRedAdmin works fine - I am able to create domains and users without issue. However, when I am trying to log on with a newly created email address in ...
0
votes
0answers
14 views

Changing ACL via Cyradm doesn't revoke or change user privileges

I have cyrus imap running on a ClearOS server and have had this for several years now. My kids are just getting introduced to email, and let's just say it has been a bit of a time waster for them. I ...
1
vote
1answer
25 views

Does SendMail Support TLS Certificates With Subject Alternative Names?

CentOS 5.x Does SendMail support TLS certificates with Subject Alternative Names? I have a set of sendmail servers and would like to use the same certificate for all of them (to save time and ...
3
votes
2answers
96 views

Setup Postfix+Dovecot reading from database

I'm trying to setup Postfix and Dovecot, the latter with virtual users stored in a MySQL database, following this guide (but here I recap everything as there are some "bugs" in the guide I fixed ...
0
votes
1answer
24 views

which domain do I setup DKIM on?

I'm trying to set up DKIN on for my organizations bulk mailing operation. Our bulk mailer is on one domain, test-news.org but all our mailings have user@test.org on the from line. I'm confused as to ...
0
votes
1answer
28 views

What version of OpenSSL does SendMail use and how is this maintained?

My understanding is that SendMail leverages OpenSSL for STARTTLS functionality (among other things). Does this link dynamically against whatever version of OpenSSL I have installed? Or does sendmail ...
1
vote
1answer
59 views

Relase outgoing mails to internet if local delivery failes

How can I release outgoing mail to the internet if local delivery fails in postfix? My server has virtual domains configured with mydomain.tld. When I send an email to somename@mydomain.tld it try to ...
1
vote
1answer
79 views

How can I explicitly force SendMail to not use SSLv3 for STARTTLS connections?

SendMail 8.14.x With SSLv3 being sunset (to put it lightly), I'd like to ensure that my SendMail servers aren't using it when establishing STARTTLS connections. Is there a way I can force SendMail to ...
2
votes
2answers
72 views

Exchange / Outlook Managing multiple smtp addresses

In our company some of our employee's have multiple email addresses on multiple domains. Now we have tried multiple setup to manage this situation, only to find that there is no ideal one. We are ...
2
votes
1answer
56 views

Postfix SMTP server gets “550 Requested mail action not taken: Invalid IP”

I have a SMTP server named smtp-ca.mdpi.com and when sending emails to some specific chinese email domains, I am getting back: 550 Requested mail action not taken: Invalid IP<64.15.147.140> (in ...
-1
votes
1answer
87 views

Apache & mod_proxy - What's wrong?

I am limited to one external IP on my server thus to run a mail server alongside with other Apache instance for web hosting, I believe I am forced to use mod_proxy. I tried using mod_proxy in the ...
2
votes
3answers
117 views

Postfix + Php Mail() VS Postfix + SMTP

Most CMS (Joomla for example) comes with php mail() as default and has the option of changing it to SMTP if we want. I will be setting up both the webserver and mail server (Postfix) in the same VPS ...
1
vote
1answer
58 views

Postfix and “local mail”

That's the first time I'll configure a mail server. I explain you the complete picture. Currently, my company company.com has an ...
0
votes
1answer
49 views

Which difference between /etc/aliases and virtual_alias_maps in Postfix?

Which difference between /etc/aliases and virtual_alias_maps in Postfix and where should I put aliases from local accounts to virtual user accounts (i.e. from root to postmaster@example.com)?