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

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14 views

Multiple regex statements to match

How can I manage email headers to reject all emails from specific email domain with specific filetypes? For example. If @gmail.com and filetype is .exe then reject. if /name=.*.exe/ if ...
2
votes
1answer
36 views

Postfix virtual domain mapping user for a user a linux name containing @

I could not make Postfix work with Linux usernames containing @ Postfix has virtual domain map, in /etc/postfix/virtual It looks something like this: domain.ru domain.ru ...
0
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0answers
10 views

Sending email from a local test virtualbox when SPF and DKIM are setup

I'm trying to setup discourse and so I thought I'd start on a virtualbox and eventually migrate to a digital ocean droplet. It's setup, it's running, but outgoing mail is not working. I've got SPF ...
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votes
0answers
13 views

How to change the hostname of postfix and still have all emails show up in IMAP?

I recently had to manually restore a server after a bad crash. I recreated the mailaccounts with Plesk and copied the mailboxes with all the emails back into their original location. I had to do the ...
0
votes
1answer
11 views

How can I set a default email domain name on debian?

I have exim4 configured on my server as an email forwarder (for example sending an email to admin@mydomain.com will result in the email being forwarded to my personal gmail email account). This ...
0
votes
1answer
26 views

Emails from my server are often being blocked as spam

When I check any of mailbox from my server with a tool like this one: https://www.port25.com/support/authentication-center/email-verification/ I get: SPF check: pass DomainKeys check: ...
0
votes
1answer
21 views

how to remove duplicate emails with scripting in Zimbra

Is there any way to delete duplicate emails from Zimbra accounts (locally hosted, licensed) with a script? I have had to export/import thousands of emails for a user, from one Zimbra server to ...
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votes
0answers
17 views

How can I open my email server to open registration? [closed]

So I'm curious on how to open my webmail server to the public as an experiment. I have a standard mail stack, with Postfix, Squirrelmail, SpamAssassin, Dovecot and the like. I don't intend to run a ...
0
votes
1answer
34 views

Zimbra 8.6 sends some mail into black hole

I have a Zimbra installation running on Centos 6.6: Release 8.6.0_GA_1153.RHEL6_64_20141215151155 RHEL6_64 FOSS edition. I have one account on the server that receives mail forwarded from another ...
0
votes
0answers
11 views

Exchange 2010 Retention

I have set up Retention tags n Policy for all users in my organization to 3 years after which mails are moved to the online-archive. Now some of the users have a folder called 'imp-emails' which they ...
0
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0answers
18 views

mailjet with brimir (open source Ruby project) on debian doesn't send mail

I tired of searching a tip to be able to send mails with mailjet on my debian. I configured a dashboard for tickets (Brimir, Ruby open source plateform) Here is the link : ...
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0answers
22 views

Managing Email for Clients [on hold]

Before you downvote, please provide some positive feedback if this is ill-posted. I manage several emails for clients (or pay for a service for them)...but as I get more, I need to look at how I'm ...
4
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0answers
28 views

How Does Low Volume Affect (esp. live.com) Email Deliverability?

I've been sending emails for years with out any serious reputational shocks, but with low IP volumes (no bulk mail or automated transactional email), even with multiple Domain names. My Gmail ...
0
votes
1answer
29 views

MX Record Failover When Primary ISP down

I need some help to configure ISP Fail-over. I have configured a Zimbra Mail Server on CentOS. It is working fine. We have 2 ISP connections and created 2 MX records for both ISP's like bellow ...
0
votes
2answers
39 views

smtp blues - external emails works, internal does not

I have 3 domains hosted on a remote server, but I am using other postfix server for SMTP only. So, I have two servers: mail.domain1.com - remote mail server, storing mailboxes and used for IMAP ...
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0answers
20 views

iRedMail/Postfix/Dovecot/Ubuntu - I can receive, reply to emails, but i can not send

I am using Ubuntu 14.04 and on fresh linux installation i have installed iRedMail. As you know it comes with Roundcube and IredAdmin. I have created several emails with different domain all of them ...
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votes
1answer
13 views

Changing from local server to web host but keeping mail in local server

I am trying to shift my client's website from their local server to a web host, they pointed domain to my web host ip address (A record), however, it does not work. I understand that if I were to ...
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votes
2answers
31 views

Mail Server for a subdomain on a different Server?

I'm currently assigned the administration of a server that is accessed through a subdomain of another (not administrating example.com but y.example.com), and assigned to implement a web application on ...
2
votes
0answers
30 views

Server “shows signs of being infected” - how to resolve email blacklisting

I help manage 178.32.51.182 and noticed we were getting bounced emails because of several blacklists those are: CBL FABELSOURCES Spamhaus ZEN so I checked the first blacklist here: ...
0
votes
1answer
12 views

How to configure exim4 to orelay email from a specific IP?

I am attempting to set up an SMTP relay server, using exim4. However, I have only one IP that I want to be allowed to send email through my server. Is this done using iptables or some configuration ...
0
votes
0answers
13 views

How to add a custom header to email sent with sSMTP?

For security purpose I need to add a custom header to each email depending on the sending virtual host. We are using sSMTP MTA and I think that the best way to this is to create a small script and ...
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votes
0answers
44 views

Postfix / Dovecot not allowing external connections

I configured Dovecot and Postfix following https://www.digitalocean.com/community/tutorials/how-to-configure-a-mail-server-using-postfix-dovecot-mysql-and-spamassassin However, I am unable to connect ...
2
votes
1answer
34 views

Postfix - rate limit outgoing concurrent connections to one machine/ip

I need to limit postfix outgoing connections for specific mailservers, but it seems to me that posfix's limiting is based on domains? What if there is one mailserver for more domains? I tried to find ...
2
votes
0answers
42 views

Huge mail.que file on Exchange Server 2013

I'm facing an issue with an huge mail.que file on the folder C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\data\Queue. One of our users created an redirect loop and the mailbox blow ...
0
votes
1answer
74 views

Debian 8 Jessie - Postfix + Dovecot, send but not receive mails

I'm setting up a mail server (with Postfix, Dovecot and Postfixadmin) for a non-profit organization that I'm currently building. I'm able to send but not receive mails over TLS. When sending an email ...
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votes
0answers
21 views

How do I prevent domain-name spoofing? [duplicate]

I have two domain names, example1.com and example2.com. I also have two users: user1 and user2. I'd like it to be possible for each user to send from USERNAME@one_of_my_domains, but nothing else. ...
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votes
0answers
17 views

Ubuntu Server; Email from PHP stopped working

I currently have a VPS server running Ubuntu. I have used this server for a while and have was using the built in mail function for PHP. Now for reason, emails are no longer sent. According to PHP, ...
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votes
0answers
16 views

email goes to spam when email body contain a anchor tag [duplicate]

i am facing a problem about email sending with a module named phpmailer. the problem is that, when i am tying to send a email contain a anchor tag as like <a href="example.com" ...
0
votes
2answers
41 views

SPF - Adding lots of IPs

I have 8 IPs in different ranges to add to my SPF records. All are subdomains mta1.domain.com mta2.domain.com and so on. I can't add each IPv4 to domain.com txt due to limitations. How else can I ...
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votes
0answers
21 views

Change postfix mail store directory

I just followed this documentation to config postfix and dovecot. I was supposed to store the incoming mails by postfix at the same location dovecot will look us that in the tutorial it says it's ...
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votes
1answer
36 views

Email Going Missing

I've setup Postfix for email delivery on a client's server and made sure that our PTR records, SPF, and reverse DNS is all configured correctly. As far as I can tell, we're doing everything correctly ...
1
vote
3answers
78 views

How much overhead does having infinite email aliases cause on the email server?

I was wondering if allowing users to have infinite number of email aliases have much overhead on the email server. For example, my mail email address could be vlad@vladmail.com but I could also use ...
1
vote
0answers
32 views

Postfix no outer mails recived because of “unknown user 550” (sending & local reciving possible) [closed]

I have the following problem: I can't recive emails on my email account on my server. Postfix sends back: error: unknown user (550) - mymail@domain.tld But it is possible to send mail with other ...
0
votes
0answers
30 views

Exchange 2010 - how to route mail for a specific domain to a send connector and all other mail to a different send connector?

I set up a journal rule, in my exchange 2010 organization hub transport settings. This works, and it sends mail to my mail archive software via a send connector entry for "@mailarc.mydomain.local". ...
1
vote
1answer
26 views

Restrict only 1 file to use sendmail

I want to restrict access to sendmail process, to only 1 php file /var/www/mysite/contact.php How can I do this? Maybe there is a trick with Iptables or sendmail configuration? I want to secure ...
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votes
0answers
14 views

gmail is filtering mail from my server to spam [duplicate]

I am really stuck here and connot find away around this gmail spam filter. Just some things that i have done: checked blacklists (not on any) Adding SPF Recoards (working) Adding DomainKeys & ...
1
vote
1answer
29 views

Determine if an e-mail contains a certain number of a specific character

I am hoping to write a SpamAssassin rule that will match if an e-mail contains over n of a specific character in the body of the message. Not necessarily continuous. So for example, if there were ...
0
votes
1answer
60 views

Postfix on CentOS 6.6 is overwriting my return-path header?

I'm dealing with this problem on my CentOS 6.6 server: when I send a mail with PHP/phpBB (mail() function), Postfix overwrites the return path with apache@servername. The issue is also expained in ...
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votes
0answers
31 views

Postfix - ability to send mail from alias address? [migrated]

I have a mail server with Postifx (and dovecot) setup, on which there is an alias address (say alias@example.com) which forwards mail to my main email (myname@gmail.com). This works fine, and all mail ...
1
vote
1answer
30 views

Problems when launching doveadm

I setup this weekend an new mail server to overtake the currently by ispconfig and dovecot managed accounts. I have an issue when I run doveadm. But first of all here's the config: # 2.2.13: ...
0
votes
1answer
30 views

Sending an email to multiple recipients via a mail relay, while hiding the recipients

Our software sends emails using Exchange. Typically each email foes to multiple recipients and we just send one email with multiple "to" addresses. We're moving to an SMTP-based email relay, where we ...
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votes
1answer
34 views

Is it possible to make me send an email by opening a malicious email? [closed]

I know I don't have much info on this problem/question so I will delete if everyone downvotes or votes to close/delete. Is it possible for someone to make an email look like I sent it simply by me ...
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votes
0answers
16 views

Compound SPF record syntax [duplicate]

We send transactional email from our own server and use Google Apps for email. We have the transactional server SPF set up: v=spf1 ip4:37.xxx.xx.xxx ip6:2xxx:4xd0:a:1f39::1 a mx ~all but need to ...
0
votes
1answer
14 views

How do I allow a specific program Send as access in Outlook?

I have been searching around on the web and the closest thing I found was This Article. It states that I need to click allow when the security warning pops up. however using Sage software means my ...
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0answers
14 views

ossec-maild not sending out any alerts (relaying through ssmtp)

my problem is I can't send out any emails/alert notifications with the ossec-maild process. I'm relaying my emails through ssmtp, the configuration is valid because I'm able to send out mails to ...
0
votes
1answer
29 views

Postfix dynamically set Relay Host [duplicate]

Does anyone know of a way to dynamically set the relay host when sending mail through Postfix? At what point does Postfix set the relay host? Is there some way that I can tell Postfix to use a relay ...
1
vote
0answers
11 views

rsyslog Email On SSH/SFTP Login Fails

I have tried the following on my Nginx server, but do not get any emails upon SSH (or SFTP) login. I put this code in /etc/rsyslog.d/notify.conf and have ensured this file is being called by ...
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votes
0answers
16 views

How can I block outgoing email with multiple recipients with non matching domains?

We have Exchange 2007 and I've been trying to work out how to block outgoing emails from certain internal users/ groups where the recipients are in different domains so that any single outgoing email ...
2
votes
1answer
33 views

Can IP reputation be affected due to automatic forwarding?

I am hitting a dead wall with the support team of my email hosting provider. The IP they assigned me was blacklisted and so sending emails to AOL.co.uk end up getting rejected. After several emails ...
0
votes
1answer
37 views

Gmail marks all my emails sent by exim4 as spam [duplicate]

I configured a Virtual Private Server as send-only mail server with exim4. Anyway, when I send an email to a Gmail account, it is marked as spam, because "it violates the guidelines for the sender ...