The server configuration of email, including POP3, SMTP, IMAP, and popular server software packages that control email.

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43 views

Undelivered Mail Returned to Sender

How can i fix this. From: MAILER-DAEMON@adam.yocta.com (Mail Delivery System) Date: 26 April 2016 at 5:50:23 PM GMT+4 To: contactus@immunity.ae Subject: Undelivered Mail Returned to Sender This is ...
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1answer
38 views

Exchange server 2016 Content Filtering

I have setup an exchange server on premise with at SMTP Relay on our VPS. It works very well, unfortunately I’m a little confused as to where I setup the various permissions for SPAM. All my incoming ...
0
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1answer
82 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 ...
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2answers
43 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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2answers
57 views

Simple way to send mail from Docker container?

I have a backup script that runs inside a Docker container and I would like it to send me an email when disk usage gets low. Here's the script: #!/bin/bash CURRENT=$(df /data | grep / | awk '{ print ...
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5answers
13k views

Postfix aliases and duplicate e-mails, how to fix?

I have aliases set up in postfix, such as the following: all@mydomain.com: foo@mydomain.com, bar@mydomain.com ... When an email is sent to all@mydomain.com, and any of the recipients in that ...
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1answer
30 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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1answer
66 views

Migrate mail server [closed]

I have an old mail server that I have to migrate to a new server with a different name and IP. I know how to do that (just copy the maildir directory), but how can I do that without my users having ...
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1answer
25 views

Is this considered as spam email generated by postfix?

I have just checked my email log at /var/log/mail.log Apr 22 22:09:02 server2 postfix/pickup[14310]: D1FCF737C5B0B: uid=0 from=<root> Apr 22 22:09:02 server2 postfix/cleanup[17071]: ...
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1answer
62 views

Using DKIM in my server for multiple domains (websites)

As I couldn't find this exact tutorial in Stack, I share my findings with al of you. I always get things solved thanks to this comunity. Thanks! Original question: I've read the tutorial posted by ...
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2answers
29 views

How do I enable recipient verification in Exchange?

My problem basically boils down to this: Exchange (2016) is accepting mail for non-existent addresses and then later sending out DSNs (delivery status notification) to notify the sender of failure. I ...
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1answer
41 views

554 5.7.1 unknown recipitent [closed]

I'm trying to send an email to M@Danielmadison.co.uk (there are no attachments being sent if that would affect anything) and i keep getting the following message: Delivery to the following recipient ...
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5answers
26k views

How to send the output from a cronjob to multiple e-mail addresses?

In the beginning of a crontab file you could use the MAILTO instruction to indicate you want the output to be sent as an e-mail to an e-mail address. I would like to send the output to multiple ...
1
vote
1answer
62 views

Can't send mail from amazon ec2 instance

I am using an Amazon EC2 instance for two projects which have their own domain name. I need using mail services so I created two email accounts on Zoho and I have been able to receive emails from my ...
6
votes
3answers
171 views

What is DNS TXT record “mailru-verification”?

Sometimes I see this mailru-verification DNS record. I've Googled - and Yandexed ;) - but I found nothing about it. I suspected that is a kind of russian SPF implementation... dig example.com TXT ...
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0answers
13 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. ...
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0answers
10 views

postfix sender_bcc_maps to local mailbox

I have an email relay set up using postfix. I would like to archive emails from a specific sender to a local unix mailbox on the same machine. I have postfix configured using sender_bcc_maps, and it ...
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2answers
6k views

How to change sendmail fallback behavior if TLS handshake fails?

I have a CentOS 5.x server running sendmail that is failing to negotiate TLS with SOME various recipient servers. I'm looking into it. In the meantime though, I've noticed that sendmail will NOT ...
1
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1answer
55 views

Spam filtering: MX record and reverse DNS (PTR)

If I perform an MX query on my domain (domain.com) I receive this answer: Pref Hostname IP Address 5 mail.domain.com 12.34.20.145 If I perform a reverse DNS (PTR) query on ...
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0answers
45 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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2answers
12 views

sendmail: Redirect one specific mail

I do not have any experience with sendmail and googling around didn't help me so far. I need to redirect every email that goes to a specific address to another address in the same domain. For ...
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0answers
10 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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3answers
3k views

Backing up the open-source edition of Zimbra mail

Background: We run the open-source edition of Zimbra mail (5, not 6 yet) and while it's not something that we want to encourage (prevention is better than a cure), we currently have no way of backing ...
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1answer
28 views

Domain and mail redirect [closed]

I have domain at providerA and hosting with domain at providerB. I configured DNS that domainA would redirect to hostingB. With .htaccess setup so now entering either domainA or domainB it shows ...
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1answer
17 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 ...
11
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2answers
13k views

Can postfix be set up to forward mail to multiple recipients

I have the following postfix virtual file: test@domain.com bob@me.com This correctly forwards all emails to test@domain.com to bob@me.com However I would like to forward these emails to ...
0
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1answer
12 views

Automatically create virtual email for user using postfix

On our website, we have some special users that can be contacted by email. It means that for now, they have a public profile page where after a mouse click their email is visible. Moreover, to log on ...
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2answers
453 views

Can't send email on Windows Server 2008 with Mailenable

I've got a VPS running on Windows Server 2008 and I'm using Mailenable as an Email Server for POP3 and SMTP. I've had the VPS since January 2015, its my first time configuring a server by myself, but ...
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3answers
2k views

Extract sender activity from postfix logs for auditing user

We have a mail user on our postfix server that was using the company mail to send compromising information to our competitors. I've been asked to make a report of the actions for that user in the ...
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2answers
30 views

Dovecot: Relative home directory paths not supported

This is my first time setting up an email sever, and have gone with Dovecot for the IMAP side. I've been following this tutorial. When I try to login to the server, this is printed to the error log: ...
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2answers
30 views

Postfix, setup SMTP for hosted websites

I have a VPS which hosts different domains, and I'm trying to setup SMTP with postfix, so the users can send emails via SMTP from addresses like: user1@site1.com user2@site1.com user3@site2.com I ...
32
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2answers
8k views

What are SPF records, and how do I configure them?

This is a canonical question about setting up SPF records. I have an office with many computers that share a single external ip (I'm unsure if the address is static or dynamic). Each computer ...
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4answers
2k views

What is the fastest mail server software [closed]

I'm currently developing an application which may have to send a large amount of e-mails at once. I was wondering what you guys would recommend as the fastest (e-mails sent per minute) mail server to ...
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2answers
46 views

Someone sending email through my Postfix/Dove

there might have been answers to this many times. But I can't seem to find one that fits my issues so here we go: I've ran an email server on my centos machine for over four months without problem, ...
8
votes
3answers
62k views

554 - Sending MTA’s poor reputation

I am running an email server on 77.245.64.44 and have recently started to have problems with remote delivery of emails sent using this server. Only about 5% of recipients are rejecting the emails, but ...
0
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1answer
26 views

Web App Error After Installing Java on Centos Server

Good day. My web app is programmed in jsp, using some of jQuery and javascript, is on a server with Centos 6.4, the app run its own java 1.7.0 - tomcat 8.0.21 and between its functions, uses ...
0
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1answer
19 views

Postfix relay: Forward one domain on untouched. All others, redirect

I'm currently using a virtual_maps config with regex to forward all emails sent to my postfix server to one email address /.+@.+/ email@example.com I'd like to make an exception to the forwarding ...
8
votes
4answers
275 views

MX records, better setup for load balancing and failover

Take domain example.com, it has two mail servers mail1.example.com and mail2.example.com, both already configured, usually I would go with the following setup: example.com. 1200 IN ...
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votes
1answer
42 views

Mail server with different IP than webserver - getting 554 error

I have a webshop running on a Digital Ocean droplet, while the email inbox for the same domain is running on a different VPS. All of the sudden some of the emails sent by the webshop are being ...
0
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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 ...
0
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0answers
18 views

sending email from ubuntu to *@gmx.de always fails [duplicate]

I have a ubuntu server which has capability of sending emails irrespective of the domains. But when ever i try sending email to say myemail@gmx.de, it fails. I don't see any specific content to ...
2
votes
1answer
485 views

How \Deleted flag can be unset for all mails in cyrus-imapd mailbox?

I have a 5GB mailbox which I moved using imapsync. But somehow I messed up with --delete/--delete2 option and end up with almost all the messages having \Deleted flag set. I do not have delayed ...
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0answers
26 views

What happens with Dovecot dsync replication if the other server is unavailable?

I'm looking at setting up another mailserver at one of our other offices using Postfix and Dovecot. We have a third party spam filter that can relay incoming mail to two servers using SMTP, and if one ...
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votes
1answer
29 views

How to retrieve only headers of the email not body (Fetchmail or Getmail)

How I can to get only headers of the mail, to download the message body later. Is this possible?
1
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1answer
59 views

Running company emails at two different suppliers

Quick question regarding Exchange: We are a small company and have had our mail service hosted through Unoeuro until now. Now we have decided to move some of our mail accounts to Exchange because we ...
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0answers
12 views

ASSP testmode logic

We have been operating the Anti-Spam SMTP Proxy (ASSP) software with all of the testmodes enabled, including allTestMode. We are wanting to transition to have it actually blocking spam, but in a ...
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0answers
15 views

MySQL not creating tables automatically when JAMES APACHE is started

The programs I am using: JAMES Apache Server 2.3.1 binary MySQL Workbench 6.1 CE MySQL Connector 5.1.38-bin.jar in ~/james/lib OS: Windows 10 64-bit In james 3, I am able to create MySQL ...
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0answers
21 views

CentOS 7 Firewalld crashing server when trying to allow port for mail server

So I'm working on setting up a mail server on a CentOS 7. I'm following this tutorial: http://www.krizna.com/centos/setup-mail-server-centos-7/#install When I reach step 10 at adding firewall rules ...
0
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2answers
46 views

Multiple Domains on one Server IP-Adress

i need some help. I would like to host my own Mailserver with two or more domains. But to dont get blocked on outlook.com for example. I need a PTR to every Mail-Domain to get a correct lookup. Can i ...
0
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0answers
36 views

How to customize user notification in amavis-new so to have attachment's name that makes the mail to be BANNED

I've a CentOS6 server with Amavis 2.9.1 + Postfix 2.6.6 + clamav 0.99. I started customizing notify_virus_recips_templ text files for making users understand why our company, for instance, decided to ...