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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20 views

Should a mail server receive mail at the hostname or just the domain?

When configuring a mail server, should it be setup to receive mail at the hostname or just the domain? For example, if the hostname of the mail server is sub.domain.tld, should mail from anywhere be ...
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1answer
117 views

SMTP: Received from unknown [xxx.xxx.xxx.xxx] -> but IP does have a valid PTR/RDNS

I got the following problem. I got an smtp-relayserver that collects outgoing mails from other servers and checks them (spam assassin). Now the headers are showing this: Received: from ...
-1
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0answers
8 views

Running an own Mail Server on Amazon EC2 - How to keep Server of Blacklists [duplicate]

We're thinking about running our own mail server on a Amazon EC2 instance. The main issue, that we are expecting, is to keep the server of SPAM blacklists. What are the necessary precautions we have ...
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0answers
4 views

Gmail relay server not working from one sender 550-5.7.1 [duplicate]

I've got a postfix server set up to relay emails sent to my personal domain to a gmail account. It's been working fine for everything until today when a sender reported that all their emails are being ...
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0answers
18 views

Which wireshark output format aligns closest with actual SMTP data?

I have a packet capture of a SMTP session (containing an email with international characters). I'd like to extract the message data from that and try reproducing an issue. When I follow the TCP ...
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1answer
9 views

zimbra mail quota view command line

I am using zimbra 8.5. When i am trying to view the mail quota of all users from the admin GUI, the whole system hangs and we will have to restart the system to make it work again. I searched in ...
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0answers
18 views

Exchange 2010 Server not receiving “reply” emails from 2 domains

This is a strange issue, and I'm not sure it's even on our side. But trying to get to the bottom of it. We have an in-house Exchange 2010 server. A month ago, this one domain - let's call it ccc.com ...
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1answer
23 views

Using TLS in email sending

I've configured my server (Exim on Debian Linux) to send emails (with SMTP) only to email servers which accept TLS. I did this so that nobody can steal a password reminder email. Right decision? Do ...
0
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1answer
16 views

exim4 issues sending mail to gmail

I am trying to send automated emails from my server to my gmail account, so that I can get important notices like when my webserver is not responding, or just some daily statistics. As email sending ...
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2answers
33 views

Bulk emails - what to do with “over quota / mailbox full” undeliverable emails?

We send out newsletters / bulk mail (double opt-in of course). We automatically delete hard bounces (mailbox unavailable, user unknown, host unknown...) right away from our mailing lists. But a lot ...
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0answers
7 views

Hide High Scoring Entries from ASSP Daily Block Report

I enabled the daily block reports on ASSP, but they aren't terribly useful because they include all blocked messages, even those that have such a high score there is almost no possibility they are ...
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0answers
12 views

No folders on E-Mail using Postfix, Dovecot, RoundCube, all in MySQL

I don't have any folders on RoundCube for users. I have set up RC configs to auto add them and Dovecot should do it too, don't know what I did wrong. I use MySql (MariaDB) on RoundCube and Postfix. ...
28
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5answers
363 views

Is it becoming impossible to be a small mail provider?

I operate a small mail server for my private emails, some friends who have websites and two NGOs. In total my server sends between 60 and 400 messages a day. Now a lot of these emails are personal ...
1
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1answer
32 views

Why is exim not adding the DKIM header to emails?

My emails used to be getting signed with DKIM in the header. Now if you check the email source it is not signing. Whatis wrong? How can I debug, what logs can I look at? cat ...
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0answers
19 views

Postfix error Recipient address rejected: User unknown in virtual alias table

I have set up a Postfix email server with Dovecot for IMAP running on FreeBBSD 9.3. I am having an issue where I am unable to send an email to any users on the server from an external domain name. I ...
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1answer
13 views

How to configure postfix with ufw so that my web server can send email but it doesn't act as an open relay?

According to this guide: It is important to secure your server and make sure that Postfix is not configured as an open relay. It links to another guide which suggests using UFW as a firewall. ...
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0answers
7 views

exim4 failed to read delivery status : frozen message

I'm having some difficulty with exim4 in that after sending an auto_away message successfully, it has difficulty reading the status and then creates a frozen message in the mailbox. 2016-04-19 ...
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2answers
41 views

MX Record Host Name Change

I'm trying to set up my own email server, but am unsure what to change the MX record 'target' to. (I'm unclear if this is the correct terminology, hence the inverted commas.) I should say that I'm ...
1
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1answer
13 views

Update after MailEnable manual MAI copy

I've manually restored mai files after I had to recreate mail account. Now Outlook like clients are able to download those mails but in webmail (MailEnable Webmail 9.00) I cannot see any of those ...
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0answers
20 views

SSL Certificate works except for with z-push

I have Ubuntu 14.04, LAMP, Dovecot, Postfix, and z-push-2.2.9. The email is setup direct on example.com. When I use this z-push setting: define('IMAP_OPTIONS', '/ssl/notls/norsh'); I get the ...
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0answers
6 views

Apache James: eval: /opt/james/bin/./wrapper-linux-x86-32: not found

I'm setting up a James server for the first time. I'm using 3.0-beta4. After I copied the binaries to /opt, I tried running it: neonorb@neonorb /opt/james/bin % ./james start Starting Apache James ...
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2answers
28 views

use postfix two mail server with two MX records

Our current setup is a webserver at www.domain.tld (DNS A record) and a mail server (postfix) at mail.domain.tld (DNS MX record) on one dedicated server (IP address 1.2.3.4). Our website sends out ...
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1answer
24 views

Can't setup mail server on Azure Virtual Machine with ARM

I just moved my class VM server to the new VM in Azure but I am having trouble doing a reverse DNS on the VM. Speaking with Azure they sent me this link below. Are they telling me I can't even host ...
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0answers
7 views

Using mail.domain1.com for domain2.com mail server? [duplicate]

I have a Linux CentOS machine, and 2 domains hosted on it: domain1.com domain2.com Is it safe to use one mail server for both: mail.domain1.com? If I use mail.domain2.com, I have problem ...
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0answers
16 views

Google puts my mails to spam [duplicate]

I have a mail server with proper (I think) configuration, but Google puts my mails to the spam folder. I see the following error in the source: Received-SPF: fail (google.com: domain of ...
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0answers
15 views

Getting “Failed to initialize temporary dir” in Dovecot when doing MOVE to Spam via IMAP

The IMAP client attempts to move emails in Spam folder. Sometimes (very rarely) this operation fails as below: > TAG4 UID MOVE 32235,32234 "Spam" < TAG4 NO [CANNOT] Failed to initialize ...
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1answer
28 views

How to find out what Google account a domain is associated with?

I have a client who needs to add new email accounts to their domain. However, when I access the admin page for the domain, there are no email accounts there. And in the DNS there are MX records ...
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0answers
34 views

Error connecting to IMAP server due to Permission denied

I'm using Postfix as MTA, Dovecot as IMAP server and Squirrel mail for web client. All of them are hosted in centos 6.7. Everything goes fine, but sometimes it shows following error(I face this more ...
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0answers
15 views

Unable to query DKIM because of DNS timeout

I run dkimproxy to sign outbound email and verify inbound email. Since a while, I am experiencing the following permanent problem. The dkimproxy service is unable to query the DNS. Each and every ...
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0answers
15 views

Dovecot - postgresql DB lookup

I am scratching my head when configuring Thunderbird with my Postfix/dovecot server. The email client connect to the server but will not accept my username/password. But looking at dovecot log, user ...
0
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1answer
32 views

Php mail is erratic: sometimes sends, sometimes doesn't

I have a server set up to use postfix to send mail from the server. When a user registers at my Wordpress site, an email is sent to the administrators, both of whom have gmail addresses. Sometimes ...
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2answers
57 views

Trouble setting up mail server(postfix, dovecot) on centos

I'm having trouble setting up my mail server, i have followed this tutorial: http://www.krizna.com/centos/setup-mail-server-centos-7/. Now i'm trying to send mails to my outlook adress, but i can't ...
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0answers
99 views

Not able to send mail of Hotmail with your own postfix

I purchased DigitalOcean VPS in that installing cwp.admin open source panel. Also all configuration completed like postfix,rDNS,DKIM,DMARC,SPF,DNS Settings,etc... My problem is not able to send mail ...
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0answers
34 views

Forwarding email if user is not exist in Postfix

We have a domain (example.com) which is located on an old mail server. The old mail server cannot send messages to customers when the server loaded highly. Therefore, we have to configure a mail ...
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0answers
14 views

Forward Postfix mail with alternative sender address

We have a server with postfix + ISPconfig installed. In ISPconfig the redirect is configured correctly and works: postfix redirects all mails send by sender@example.com and addressed to ...
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1answer
38 views

Add another email in GMail through SMTP server

I've had some luck using Postfix to relay emails sent to my server to multiple GMail accounts, but now I would like to go the other way around. That is, use the gmail "Add another email as your own" ...
-4
votes
1answer
42 views

Is live.de allowed to block mails from my clean mailserver? [closed]

I have a very small mailserver running. Everyone is accepting my mails - even google does - except live.de. I once had to fill in a form to identify myself as a legit mail sender, but after I moved ...
2
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0answers
61 views

gmail this message was not encrypted [closed]

I just moved my site to another hosting provider. I use SSL/TLS for connection security and port 995. It sends my messages but the problem is that gmail shows This message was not encrypted red flag. ...
0
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2answers
50 views

postfix - users are geting mail from them self that they did not send

Our company has a mail server configured with postfix/dovecot/amavisd on Ubintu 14.04. The system has been running for a couple of years and it worked fine. Recently some users started complaining ...
0
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1answer
31 views

Dovecot and SharedFolders

I want to configure shared folders in Dovecot 2.2.9 (Ubuntu). I want share folder SHARED from user test to user spamtrap. my configs: 10-mail.conf mail_location = ...
-1
votes
3answers
33 views

What hostname and rDNS should I choose?

What should I set as hostname and rDNS? 1 server 3 domains (domain1.com, domain2.net, domain3.de) 1 mail server for each domain My current settings: /etc/hosts 127.0.0.1 localhost 11.22.33.44 ...
0
votes
1answer
14 views

Postfix ignores virtual_transport setting for LMTP

I was trying to use LMTP instead of the standard LDA via UNIX-pipe for the mail transport from postfix to dovecot. I configured dovecot and installed dovecot-lmtp, now i have an (non-public) ...
0
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1answer
23 views

How to export address book from Zimbra?

I want to export all users' contacts (Address book) in csv format for migration purpose. Zimbra is runing on ubuntu and I want to do this from cli. How shall I proceed? I have refereed to this link ...
0
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1answer
28 views

SPF record for relay server [duplicate]

Obviously my own mail servers should be marked as "allow" in an SPF record, but I'm not so sure about mail relays (e.g. my ISP). Since other people (not related at all with my server) also send email ...
0
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1answer
30 views

How do I tweak spamassassin scores on Ubuntu Server?

I'm wondering what's the right way to tweak scores for Spamassassin's builtin rules. I know how to edit /var/lib/spamassassin/3.004000/updates_spamassassin_org/ but that doesn't feel right - my ...
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0answers
23 views

Dovecot: autocreate plugin is deprecated, use mailbox { auto } setting

Currently I am using this in my dovecot.conf: protocol imap { mail_plugins = "autocreate" } plugin { autocreate = Trash autocreate2 = Sent autosubscribe = Trash autosubscribe2 = Sent } My log ...
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votes
1answer
51 views

What is the minimum requirements to receive mail for a specific domain?

I think it is: A MTA - Mail transfer Agent software on the server A MX record, a DNS record specifying which server receives mail for this domain. This would deliver mail to a file on the server ...
0
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1answer
57 views

Ubuntu/Postfix not receiving emails from outside

I am trying to configure my Amazon EC2 instance to receive emails with postfix. I tried for hours but I never received an email. If I send email from same server terminal it works. This is working ...
2
votes
1answer
25 views

Catch All Email for Old Domain?

We've been on our new domain for over a year now and we have removed our redirects from the individual accounts but my boss wants to have a catch all email account so just in case there are messages ...
0
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1answer
25 views

Difference between DKIM and DomainKeys

There are two methods for signing mail out there (DKIM and DomainKeys). While some sources say that DomainKeys are "ancient", others say you need both, even though to my understanding they do almost ...