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

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1answer
42 views

Configure sendmail to reject emails without from addresses

My MTA is receiving lots of emails with no from address specified, for example: Sep 15 17:09:57 mta1 sm-mta[46864]: STARTTLS=server, relay=mx01.aquila-capital.de [83.236.242.254], ...
0
votes
1answer
24 views

command to track the highest number of smtp login in mailexim

Can any one help me to write a command for tracking the highest number of login in exim ? Additionally How can I get the top authenticated smtp login in mail exim ?
3
votes
1answer
167 views

Port25.com SPF test fails, gmail SPF pass

When testing my SPF record using port25.com's nifty little tool by sending an email to check-auth@verifier.port25.com I get the following FAIL result: ...
1
vote
2answers
329 views

Spamassassin filter systematically produces negative (ham) scores for spam messages

I have problem with lots of spam. My server setup is VPS with CentOS 6.5 and Dovecot+Postfix+Spamassassin. Here is source of one of the messages: Return-Path: <nancy_mitchell@tagbook.co.nz> ...
0
votes
0answers
134 views

RDNS_NONE from spam assasin result, when it should be positive

when trying to do a spam test on mail-tester.com, spam assassin is giving me RDNS_NONE result. Cant quite figure out why! result i get; -1.274 RDNS_NONE Delivered to internal network by a host ...
1
vote
1answer
50 views

PTR records are not valid. but they should be!! - PTR quandary

I have a perplexing problem from my point of view. Not a mail server expert though so here goes; Using mail-tester.com, done a spam test for my mailserver and it's telling my PTR record is invalid, ...
8
votes
2answers
4k views

Outlook security alert - The name on the security certificate is invalid or does not match the name of the site

SBS 2008 running Exchange 2007 and IIS6.0 CompanyA has two other companies that operate under the same roof. To accommodate email, we have 3 Exchange accounts per user to manage this. All users use ...
0
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1answer
46 views

Previous domain owner receives emails 2 years after transfer

Two years ago I purchased a domain from a seller. The domain was hosted from his godaddy account then transferred to my godaddy account. A few days ago, the seller sends me an email saying that he has ...
0
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1answer
56 views

Linux: Ignored entries in aliases file

I am trying to configure my RHEL6.5 server to send all emails addressed to root or apache to go to my external email address. I have found many guides on doing this and tried all of the suggestions I ...
0
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0answers
24 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
32 views

Drop CC Recipients

I'm looking for a way to automatically drop any CC'd recipients when users send to a specific email. It needs to happen silently before the email reaches the destination. Running Exchange 2010. Does ...
2
votes
2answers
69 views

Why is this SPF record being reported as invalid? [duplicate]

I've set up my SPF record at improvedemployees.com as follows: v=spf1 a mx ptr ip4:84.40.9.177 mx ip4:84.40.9.11 ~all I've set up my SPF record at affiliatewebdesigners.com to point to using ...
1
vote
1answer
1k views

Logstash, Kibana and email alerts

I am trying to setup email alerts using logstash. Right now it emails me EVERY time the pattern "Error" is parsed into my log file which can lead to a lot of unnecessary emails. I'd like to create a ...
1
vote
1answer
57 views

Postfix from address changed, mail being bounced

I have an Apache server which has been happily sending emails for the past few years - earlier this week the from address on all emails sent by postifx has changed and, as a result, 99% of messages ...
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votes
1answer
74 views

How to use Exim/Sendmail to stop sending email and log it that arrived via a certain SMTP server?

I have multiple accounts on this cpanel box. if someone sends an email to one of the specific cpanel accounts, e.g. smtp.some-cpanel-account.com, then it must rather be blocked and logged to file. Is ...
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votes
1answer
206 views

Prevent/Stop Namespace Mining [duplicate]

Enviroment: Plesk v12, latest Windows Server 2012 SmarterMail My web hosting provider told me that someone hacked into my server a couple of weeks ago and was hitting various mail servers (Gmail, ...
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votes
1answer
48 views

Sending emails on behalf of our clients

We wan't to send emails on behalf of one our customer. Previously we were sending those emails using our email address. But last two times we got blacklisted in SORBS database (probably because of one ...
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votes
1answer
64 views

Automated blacklist checker [closed]

Has anyone used any of these services and if so, is there one you can recommend? Ideal target would be for an MSP so perhaps would like real time alerts if an IP shows up on blacklist for perhaps ...
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votes
1answer
128 views

How can I configure myhostname to work with postfix and Ubuntu 14.04 on Azure VM

My hostname file reads as this. virtual-machine-set hostname -f virtual-machine-set /etc/hosts reads like this 127.0.0.1 localhost 191.xxx.xx.xx myazuredomain.cloudapp.net #The following ...
0
votes
1answer
100 views

mail: Cannot parse address

This is the command I use to tar my backup files, write to stdout and then upload everything to Amazon S3 with an email notification. tar -czvf - --exclude-caches /var/www | s3cmd ...
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votes
1answer
98 views

How to check MX record when delivering to virtual domains?

I run an Exim mail server with multiple virtual domains (a setup similar to this). The server is the smarthost for some other servers. Suppose I have a virtual domain example.com which has a ...
0
votes
1answer
185 views

CentOS send mail with external SMTP server and without local daemons

I've got a little old server with CentOS 6.5 on it. The hardware is old and crappy, but enough for what it has to do. Which consists of SSH (+SFTP), Apache, PHP and MySQL. Still, I'm trying to cut ...
12
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2answers
339 views

Is it still “wrong” to require STARTTLS on incoming SMTP messages

According to the STARTTLS Spec Section 5: A publicly-referenced SMTP server MUST NOT require use of the STARTTLS extension in order to deliver mail locally. This rule prevents the STARTTLS ...
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votes
1answer
25 views

spam email forwarding by server [closed]

Let's start with this scenario: We have a mailbox (i.e. in yahoo), every message is sent by this account, marked as spam by Gmail spam filter. (because the address or sender IP is blacklisted, ...
0
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0answers
53 views

Preemptively prevent down time and email issues

First of all, I apologize if this questions seems too generic. I searched this site and a few others and really did not get the answers I was looking for. Since migrating to a new virtual ...
1
vote
1answer
122 views

Restore Zimbra Mail Server from Server that crashed

I had a Zimbra installation which crashed due to Hard drive failure. The Zimbra was version 5. My backup was not good and so I did a fresh install and now I have managed to get the /opt/zimbra folder ...
2
votes
1answer
118 views

Does postfix reject spoofed senders?

Is there a reliable way to reject incoming mails with a spoofed e-mail address? What kind of checks does postfix run normally on incoming mails? does postfix check the reverse dns by default? does ...
0
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0answers
250 views

Sendmail Failing to Forward Locally Addressed Mail to Exchange Server

When a customer places an order via our (Magento CE 1.8.1.0) website, a copy of said order is supposed to be BCC'd to our sales manager. I say supposed because this was a working feature before the ...
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votes
1answer
333 views

Crontab not working to send email [closed]

I have CentOs 6.5 running on a VPS Host. I installed crontab and email using the below commands yum install vixie-cron service start crond chkconfig crond --levels 235 on yum install sendmail ...
0
votes
1answer
391 views

defer (111): Connection refused when trying to send mail

I am getting desperate for answers. The problem is simple, some email messages are getting stuck in our queue and hitting their retry limits, which ultimately end up in a never end deliverable bounce ...
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votes
1answer
231 views

Mail remove by postfix Centos 6.5 [closed]

I use Postfix for sending local mails over another relay (gmx). But the gmx-Servers block my Mails with 550-Requested action not taken: mailbox unavailable 550 invalid DNS A/AAAA resource record. What ...
0
votes
1answer
101 views

Issue with receiving emails via Dovecot/Postfix

I'm trying to set up roundcube on my server which seems to be working fine. I have gone through all of the steps and it allows me to send outgoing emails perfectly fine (tested that with yahoo), ...
0
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1answer
144 views

Problems saving encrypted emails from Outlook into Document Management System

We use a commercially available Document Management System (DMS) which integrates with Microsoft Outlook 2010. This allows users to save important emails in the DMS so that their colleagues have ...
1
vote
1answer
227 views

cannot connect to postfix with a mail client

I have been trying to setup MX in my server and was able to get the IMAP part working under SSL using Dovecot, however I can't get the SMTP part working using Dovecot as the SASL Authentication. When ...
1
vote
1answer
73 views

What happens inbetween SMTP and POP3?

I understand SMTP, and to a lesser degree POP3, but I feel like I'm missing a large chunk inbetween. I see this image on a Microsoft page: and I feel like what I'm missing is the "Internet" part. ...
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votes
1answer
24 views

RDBMS mailbox store for MDA/LDA [closed]

I am looking for a RDBMS mailbox store solution, as an alternative to "mbox", "maildir", etc., used by Procmail, Dovecot LDA, etc.
0
votes
0answers
25 views

Crond stopped sending e-mails for no apparent reason [duplicate]

I have a cron job that I want to run just once a day (executes a rake task), but while I'm testing it I have it set to run every 5 minutes. It was running perfectly fine this morning and sending me ...
1
vote
1answer
48 views

Using Google Business Email simultaneously with other mail server for one domain

My partner is having some problems with delivering and receiving emails. They asked me to check Google Business Email, if it can provide a solution. My question is: Is it possible to split users into ...
0
votes
1answer
91 views

Postfix acting as spam server. Looks like it's part of a botnet, spam messages being sent to customers [duplicate]

Let me first start out by saying I am no mail guru. If you need more info to help me just let me know. This week the mail server has been having all sorts of strange issues. It has been duplicating ...
1
vote
2answers
58 views

Restrict certain hosted sites from sending mail on Ubuntu LAMP server

I host several live sites, and several staging sites on one server that's running Ubuntu 14.04. Most of the sites are wordpress sites, and are using the php mail() function or the PHPMailer class to ...
3
votes
1answer
274 views

Turn off password expiration after user changes password (Linux)

One of my e-mail servers uses unix system accounts for user login. Because I didn't set up any complex password policies (our users, including management staff, don't like complicated passwords), one ...
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votes
1answer
81 views

Rainloop: arbitrary sender address? [closed]

I just set up my mailserver (Postfix as SMTP and Dovecot for IMAP) and as web frontend I use Rainloop - which also works very well! My setup is that I have only very few real users (actualy at the ...
0
votes
1answer
141 views

SPF failure with gmail

I'm trying to properly set up DKIM, SPF, and DMARC so emails sent from my server are less likely to be seen as spam. I got my first DMARC report and I'm little confused by this part: ...
1
vote
1answer
34 views

How to forward specific local addresses using .forward file

I have an account that recieves email using multiple addresses. I want to redirect some addresses to a different mailbox using the .forward file in my home directory, based on the local part. So say I ...
0
votes
1answer
224 views

Using SMTP Relay on a Exim Server in VPS for Multiple Domains

I am moving my email behind a dynamic IP, and I will need to SMTP relay outbound email in order to avoid spam lists. My domain is hosted through a BlueHost VPS running EXIM. I am wondering what I ...
0
votes
2answers
112 views

Mapi or Imap for small company with slow internet connection and outlook

I am helping a small company that currently have an external hosted MAPI solution in Outlook 2010-2013. It runs on 6-7 computers and for all users their outlook takes between 15-60 seconds to start, ...
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votes
1answer
45 views

Limit Emails Per Hour Per IP [closed]

Anyone knows a script or software for CentOS and Windows that can be installed onto dedicated servers with no control panel limiting emails per hour per IP or full block. Thanks in advanced!
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votes
1answer
45 views

How do I recieve incoming mail on an email address in Linux [closed]

Background: My department does a lot of communication using email to ask and answer questions. We have an internal StackOverflow type board set up but it's a headache for them to log in to the VPN and ...
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votes
1answer
218 views

Postfix sends as hostname.domain.com instead of domain.com

I've been trying to set up a debian mail server running postfix, but when I try to send mail via mail example@outlook.com the recipient sees the sender as hostname.domain.com. The hostname it sends ...
1
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1answer
63 views

imapsync some mails are not transferred

Im using this code: imapsync --buffersize 8192000 --nosyncacls --subscribe --syncinternaldate --noauthmd5 --host1 old.server --user1 old.user --password1 123456 --host2 localhost --user2 ...