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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-3
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0answers
19 views

emails to hotmail return dsn 2.0.0 but not actually delivered

The problem is that my emails are delivered "correctly" to hotmail's server but the user@hotmail.com doesn't receive it. If I whitelist the sender domain in hotmail's options, the emails are getting ...
1
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2answers
25 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
26 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
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0answers
32 views

Can somebody guide me about DMARC report [on hold]

If you can see in image, Part 1. My settings in DNS configuration. Part 2. DMARC Digest. Now my Question is - How can there are 3 trusted sources in below list as I only send through cmmails.com. ...
-1
votes
1answer
14 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. ...
-1
votes
0answers
24 views

How to migrate pop mailbox to exchange? [on hold]

I have a mailbox with 6000 mails stored locally into thunderbird, with POP server. Now, i want to migrate it to Exchange server on Outlook 2013. I followed it : ...
3
votes
0answers
24 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
43 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
66 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
44 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
36 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
48 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
42 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
18 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
41 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
13 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
23 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
77 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
27 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
50 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
64 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
54 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
44 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 ...
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votes
1answer
69 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
1answer
64 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
55 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
41 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)?
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votes
1answer
41 views

Testing a mail server

Suppose you want to test a mail server for a particular domain before going live with DNS change. For example, when you want to test an HTTP/HTTPS site you can just change your own machine's hosts ...
0
votes
2answers
145 views

Scalable Multi Server E-mail setup using Linux/Dovecot

One of my clients ask me to set-up a multi server, scalable email system. I can configure multiple servers to send emails. By using PHP Mysql based login script, users will be redirected to each ...
-2
votes
2answers
31 views

How to remove Postfix queue messages sent to a specific domain

I have a server with multiple domains. How can I clear all Postfix queue messages for a specific domain?
0
votes
0answers
11 views

Sending email from Exchange & Notes

We have a domain, contoso.com, which is running under Lotus Domino 9. Under said domain we have accounts like alexander@contoso.com or info@contoso.com, and we can send and receive eMail with Lotus ...
0
votes
1answer
23 views

Postfix acts as sender for unathenticated connections on port 25 for $relay_domains

My postfix can be set as SMTP server on any email client, on port 25, no auth, to successfully deliver e-mail to any domain listed in $relay_domains. This is bad, and can be easily used to send spam ...
0
votes
1answer
47 views

How many bounces before removing a dead address to avoid recycled spam trap?

We are developing our own mailing tool and scan log and mail error to remove dead mails from our database. When an error 5xx is returned by mails servers, we remove the mail for a determined time ...
0
votes
2answers
55 views

Mail don't reach server

I have VPS and serve several domains. DNS/MX config should be ok, as for *.com domains mails are both sent and received. Problem is with my country domain - *.hr (Croatia) - mails are sent, but ...
2
votes
2answers
76 views

Mail not delivered from custom email server (MS Exchange)

I have my own Exchange Server 2013 (SP1). I am able to receive emails ok but sending emails is not reliable. Emails sent to gmail or seznam.cz (email provider in Czech Republic) is ok. The problem is ...
0
votes
1answer
42 views

Exim 4 route all but one user to alternate smtp

We are migrating our mail server away from EXIM and are struggling with emails generated on the host server such as webforms and system messages, as they are not being delivered to the new host. I'm ...
0
votes
3answers
72 views

SPF settings for subdomains using common mail server

I am having trouble getting subdomains to pass SPF checks when sending mail through a common mail server (AKA relay host). Here's the current setup: MX 10 mail.example.com. example.com. TXT ...
0
votes
0answers
33 views

Sending mails from a contact form to a mail adress of the same domain but the mailserver is not the same like the hosting server

I have a website example.com/contact with a contact form hosted on one server. For the emails info@example.com I use an other server. In the settings for the domain I redirected the A-entry for the ...
-1
votes
1answer
33 views

Postfix conditionally forward email [closed]

How do you set up automatic email forwarding based on conditions like: forward if from emailaccount@domain.tld forward if from domain is domain.tld forward if subject contains word 'Urgent' and ...
1
vote
1answer
73 views

How to get exim4's smtp and pop3/imap server name and settings?

I'm missing exim4 configuration file in /etc/exim/exim4.conf. dpkg-reconfigure exim4-config runs OK and sending/receiving emails is also OK. I just don't know where is the configuration saved. The ...
0
votes
0answers
33 views

Mail to localhost user doesn't work after installing sendmail

I want to send emails to other domains from my virtual Debian server, so I've installed sendmail-bin and sendmail. Since then mailing to gmail adresses works, but mailing to users in localhost mail -s ...
0
votes
1answer
52 views

E-mail always send to spam folder [duplicate]

I have an VPS that has a pre-installed DirectAdmin and exim mailservice. But i've got a complainment from my client. When he tries and send an e-mail from his account to someone it gets flagged as ...
0
votes
1answer
35 views

PostFix Config and PHP

I'm trying use the PHP mail function to send email on a server (the server is only suppose to send emails and not receive any emails) The PHP mail function returns that email has been sent, however ...
-1
votes
1answer
66 views

Solution for a Mail Server (Quality / Price) for 5000 accounts [closed]

I'm looking for a new solution for 5000 accounts. Right now, I'm with atmail, but it is failing a lot, and it is very expensive. I was seeing that with InmotionHosting, I could rent a dedicated server ...
0
votes
0answers
19 views

one email server per domain in a shared hosting environment or one global server?

I'm about to setup a shared hosting server for a few projects and domains. I will separate each project from each other with openvz. However I don't know yet,how to handle emails. Is it better to ...
1
vote
2answers
23 views

Will a mail relay be blacklisted if it accepts a mail relay request then later sends NDR?

Got a question about blacklisting behaviour. Internet MX records for "mydomain.com" point to my anti-spam gateways. The anti-spam gateways then relay the email to my mail server. If someone sends an ...
0
votes
0answers
37 views

Connection refused while sending or receiving email

04 TLS server with iRedMail installed. When just installed it worked okay but after 4 emails I get a error message Sep 9 12:24:18 hostname postfix/smtp[9907]: connect to ...
1
vote
2answers
106 views

Two mx records for two different mail servers in the same domain?

I have a domain named example.com. I want to set two mail servers on this domain. The main purpose to set these mail servers is to have two different mail server, as if we have two different domains ...
0
votes
1answer
57 views

Windows 2012 Essentials DNS problems querying certain RBLs

I'm running a mail server, Smartermail (SM) on Windows 2012 Essentials. The server is also doing DNS, but has no other roles. The DNS server is using the root hints and has no forwarders configured. ...