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

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22 views

What is the purpose of an email Sender header? [duplicate]

My understanding is that the From address of an e-mail is only for human readers. Automated spam checkers, relays, and suchlike will check the Sender address, and will look at the From address only if ...
1
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1answer
13 views

Group several Nagios notifications in a single email

I have a set of passive checks that I update once a week. I want to set up email notifications. I would like that a single email is sent. This email would contain the list of all services in error. Is ...
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0answers
93 views

Postfix, allow specific users to send to selected domains

I'm looking into whether it is possible to allow specific users(senders) to send to a given email address. This is to be used, so that only the management can mail all@domain. I have looked into the ...
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2answers
137 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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1answer
74 views

Postfix email server sending in junk folder

I’m trying to configure a mail server with Ubuntu 14.04 (Postfix+ dovecot, hostname=idcmail.idc.healthcare) but my emails are being received in recipient’s spam folders. I know there are many answers ...
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1answer
91 views

Postfix - Can't Receive External Mail

i am using webmin control panel with postfix mail server and every thing working well i mean email message is encrypted and mail sending from my server to other companies like gmail also working very ...
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1answer
43 views

Force Postfix to ask autentication

If I try to telnet a popular SMTP server I get this messages: telnet smtp.mail.yahoo.it 25 Trying <ip>... Connected to <smtp banner>. Escape character is '^]'. 220 <smtp host> ESMTP ...
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0answers
25 views

FCrDNS for a mail server that also runs other services (http, ftp etc)

I am learning how to administer productive internet-facing machines and services, and towards that end setting up mail, web, and a couple other services, all on the same box (budget constraints and ...
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34 views

Postfix and PostgreSQL: How to make same aliases work for different domains?

I've currently three domains. I want to setup (mostly) the same aliases for every domain and retrieve the mails on Thunderbird. It already works to send/receive mails for contact@domain1.com, contact@...
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1answer
32 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 ...
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96 views

SpamAssassin: avoid FREEMAIL_REPLYTO on Contact Form

Suppose: someone fills out my contact form on www.example.com/contact/. My server-side script sends this information to a sales person at the organization. To make SPF work, I set the "From" as ...
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1answer
50 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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1answer
56 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 ...
2
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1answer
40 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 ...
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2answers
81 views

huge amount of data is written to mail.log once every minute

I'm on Ubuntu server and a huge amount of lines is written to my /var/log/mail.log once every minute. The lines look like: Mar 11 17:39:08 Ubuntu-1010-maverick-32-minimal postfix/qmgr[1085]: ...
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1answer
36 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 ...
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2answers
60 views

Send Postfix outgoing mail through a Google Apps alias

I have a domain example.com set up as follows A server hosts a website and other some other stuff Google Apps handles my email and is configured to send and receive it Whenever the server needs to ...
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0answers
14 views

Right way to force autresponder script to authenticate against postfix

I'm running Postfix 2.11.1 and i've configured an autoresponder by adding those lines to postfix's master.cf postfix_response unix - n n - - pipe flags=Rq user=...
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1answer
60 views

SPF in hotmail are not used [duplicate]

I have a problem with Hotmail provider, all mail sent from my server goes to SPAM folder. I Have added a correct SPF to my domain example.com but into the headers is not used (spf=none) and the token ...
0
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1answer
29 views

exchange 2013 content-type header

I am creating Transport Rules to create company-wide signatures. One of the quirks that I noticed was that, while everything looks great for HTML mail, anything sent in plain-text includes a bit of ...
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0answers
11 views

Sendmail : save emails into files

I use sendmail to manage the emails of my website. I'm testing features which require to send emails, and I'd like to receive these emails in a local directory of my server, store them as text files ...
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0answers
24 views

Cache status code of rejected relayed mail to immediately block aggressive clients?

A legitimate client relays mail over mail server A to the destination server B. B rejects mail to recipient with status code 554 and the reason "Unknown recipient". Can this rejection be "cached" for ...
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0answers
12 views

Fetchmail and Procmail set up with TLS

I'll start by saying I'm pretty uninformed when it comes to mail protocols, encryption, and basically everything else relevant to this question. My goal is to set up fetchmail/procmail on a machine ...
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1answer
45 views

Send authenticated mail without editing DNS records [duplicate]

How can a mail server send authenticated mail (using DKIM, SenderID, SPF etc) without adding records to the sending domain name's DNS server? I've read Jeff Atwood's very useful guide to sending mail ...
3
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1answer
119 views

Delivery Status Notification (Failure) => 550 SPF: x.x.x.x (IP address) is not allowed to send mail from <our-domain.com>

Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the server for the recipient domain <repipients-domain.com> by <repipients-domain.com>. ...
3
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2answers
111 views

Postfix sender address rejected / using multiple addresses

I have an email server running Postfix that generally works great. I'm trying to use this server as the SMTP server for outgoing mail in a CRM/Marketing platform installation. I've entered the ...
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2answers
280 views

Why does my server hostname appear in Exim email headers sent from a different domain?

I've had several problems with SMTP emails from my server and domain sent using Exim being blocked by certain other domains, which may have been partly due to certain server settings tripping up ...
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0answers
25 views

postfix : Cannot send email using mail() function in PHP

My question may seems duplicate. But I did not find any question with the same environment as mine. I'm using Postfix under CentOS 6.4. I am also using LAMPP. This server does not have iptables ...
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3answers
52 views

Cronjob: E-Mail with Cronjob output from mailutils is empty

I am tempering with my cronjobs to change the sender and subject for emails sent by the cronjob. For sending emails I installed the mailutils package on Ubuntu 14.04. This is how I am sending my ...
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0answers
33 views

configure exim4 on ubuntu with let's encrypt

I need to send mail for a website of mine using PHP mail(). I wanted to make sure this mail is sent encrypted. I already have exim4 sending mail via PHP, but want to make sure it's using a ...
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0answers
30 views

Handling errors with php on nginx reverse proxy, and mail response to admins

Is there a way to access the server response from php once Nginx detects an error, and mail the server response to the admins while at the same time show a custom error page to the visitor? Currently ...
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0answers
16 views

Local delivery of mails for mailman when using fetchmail

I'm setting up a mailman (for managing mailing lists) which will live on a machine in a local network behind a router. Sending out mails and managing works well, the only problem left is the handling ...
2
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1answer
32 views

letting anonymous users use a form to send emails as if it is from their own mailboxes without getting flagged as spam

I am working on a project for an environmental NGO. They want to let users use a form on their website, provide their name, their email address and select certain emails from a list to send complaints ...
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2answers
59 views

smtp email forwards with Gmail and Wordpress

I'm looking for help. I'm trying to add a new email account to Gmail. I've done it before for one of my websites email domain and it worked fine. However, now, this is the message I get. Furthermore, ...
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1answer
66 views

ssmtp root alias doesn't work

my ssmtp doesn't change "To" from 'root' to my email. In my ssmtp.conf I have: root=servers@latina.com In debug output I found only one difference between working and not working commands: working ...
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1answer
63 views

Debian: How to lock root account AND still use cron. (cron does not work while locked account :( )

I'm setting up a small private server which is connected to internet. For security reasons I would like to lock my root account after setting everything up and then use a sudo user for further ...
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0answers
74 views

Postfix SASL server said: 535 5.7.8 Error: authentication failed:

I have a mail server (running on Ubuntu server 12.04) that worked fine until a couple of months ago. After I forgot to renew my cacert.org free certificate, I created a new certificate and loaded it ...
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1answer
263 views

Email abuse reports for outbound.protection.outlook.com

I've recently set up a DMARC record for my domain and now I'm receiving email abuse reports from hotmail.com that state: This is an email abuse report for an email message received from IP 104.47....
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2answers
73 views

What's the usual re-sending time period for SMTP servers? [closed]

What I want to ask is about SMTP servers, say, which operate at different IT companies (hosting SMTP servers, corporate SMTP servers etc.) I know that every server can be configured differently, but ...
0
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1answer
31 views

Minimal postfix config to receive email

I have do.ma.in with next DNS records: do.ma.in A a.b.c.d mail.do.ma.in A a.b.c.d do.ma.in MX mail.do.ma.in I want to receive one mail from mail.google.com to my postfix to only one ...
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0answers
32 views

Postfix not forwarding emails, but sends them from command line

I did have postfix working a few months back, then for some reason it stopped working. I only want forwarding emails, not mailboxes. I've setup forwarding using the virtual file, and configuring main....
0
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1answer
79 views

Is it possible to send mail to other domain without ssl authentication? [duplicate]

we are using Postfix 2.11.3 on Ubuntu 15.10 Here is configuration file: smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no readme_directory = no ...
0
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2answers
118 views

Dovecot: “Failed to write to main log (No space left on device)”

Every single morning, my dovecot service goes down and i need to start it again, and it is repeating day by day, so i was looking for some clue to find out why it was coming down, and i found that ...
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0answers
48 views

set X-Original-To in postfix virtual forward

I am using postfix virtual alias map to forward email sent to our support email info@ourdomain.com to Zendesk at support@ourdomain.zendesk.com Unfortunately there is no information in the email ...
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1answer
101 views

Find Stale/Inactive Exchange Mailboxes

Hoping someone can help with this/it's an easy to explain issue, but basically I'm looking to find mailboxes in our Exchange 2010 environment that haven't been logged into for more than x days/a ...
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1answer
56 views

Cant sent mail from own server to google

I'm running a mail server and I'm having problem with sending mails to google. Mails to other providers work fine. I guess its maybe related to my DNS settings, as I've read that google is quite ...
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2answers
114 views

signed-by in mail header is not added as I have installed and configured my domain

I have checked in http://dkimcore.org/c/keycheck that my site has a valid TXT record for DKIM. My domain is myDomain.com and my selector is mail. I used -t and says to servers to ignore errors and ...
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2answers
204 views

Hide server IP from received-header (STMP via sendgrid)

I use a PHP-CMS to send emails via SMTP. The problem is that I want to secure my server against DDoS, so I've installed CloudFlare and I want to hide my real server IP. When users get an email by the ...
1
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1answer
24 views

Emails displaying incorrectly - Body shown as attachment

I have an issue with our journal mailbox displaying emails in a strange way. We have a mailbox called archive that is used to journal/capture all email in and out of the mail server. Our email archive ...
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0answers
34 views

iRedMail server - Error RCVD_IN_MSPIKE_ZBI

When i go to https://www.mail-tester.com and test my email i receive this error: -0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid This negative score will become positive ...