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

learn more… | top users | synonyms (1)

0
votes
2answers
183 views

How to block IP addresses from port 25 [closed]

PROBLEM: Users are getting 15-20 SPAM emails per hour, even with SpamAssassin set to its most aggressive settings SOLUTION: SPAM filtering services are available from companies like McAfee (Intel). ...
2
votes
1answer
46 views

Catch incoming email and then deliver to original recipient on sendmail

in the company I work for there are a user that is making bad use of the email, but to have evidence of what he is doing we need to intercept all the incoming email to him and all outgoing email from ...
0
votes
0answers
50 views

Exim 4.72 doesn't verify recipient

I have a problem with recipient verification. I have next configuration for acl_check_rcpt: accept hosts = : deny message = "Invalid characters in the address" domains = ...
0
votes
0answers
20 views

Is “Received: from hostname (localhost [127.0.0.1])” triggering spam filters? [duplicate]

I am running my own postfix Mail Server. All my mails are Spam filtered (at least by Gmail and Yahoo). I don't really know why they are filtered, because I have implemented SPF, DKIM and DMARC. ...
0
votes
0answers
74 views

Hotmail SMTP cache?

So this is an odd one ... Does Hotmail in anyway resolve and cache information for MX records or A records for individual email addresses? For Example: I setup a personal test bed mail server and ...
0
votes
0answers
21 views

Starting qmail-toaster: svscansvscan: warning: unable to read directory: access denied

I got such message when trying to start qmail-toaster: Starting qmail-toaster: svscansvscan: warning: unable to read directory: access denied All permissions are correct. drwxr-sr-x. 2 alias ...
-1
votes
1answer
75 views

postfix apparently relay email

I have read as many documents as I could understand about tuning postfix main.cf parameters, but still get some external email relayed. Here is a typical example in /var/log/mail.log: Mar 6 06:26:13 ...
4
votes
1answer
122 views

Configuring nagios notification settings to be very frequent

I've set up a Proxmox VE Cluster with three nodes. Each nodes has a number of VMs running on it. I'm using the PVE Monitor Plugin to set up the hosts and services, which works fine. My issue is that ...
0
votes
0answers
31 views

Server exploited, perl script sending spam [duplicate]

my server with centos 6 is sending massive spam. Before move the backup on the new clean server, I must understand what is going on. let's read some logs mail log Jan 10 14:21:00 vps63495 ...
3
votes
1answer
52 views

Exchange 2013: Weekly Message Count

I have a manager needing to check on an employees sent and received message count as the employee is stating they are getting too much mail compared to others in the company. I've been checking ...
1
vote
0answers
403 views

Rejected emails when sending from google apps to some domains (550 Unrouteable address/Sender verify failed)

i'm sending emails from my domain prokubo.com using google apps and i'm having returned emails at least when sendind to two different domains: Delivery to the following recipient failed permanently: ...
4
votes
2answers
369 views

Parse undelivered mail headers (bounced mail)

What is the best way to parse the headers of bounced (undeliverable) email that is sent back to my server and determine whether it is a soft or hard bounce? I only send opt-in emails to my users, but ...
1
vote
0answers
51 views

Resources invitation policy in Kolab 3.4

When anybody reserves a resource, it's automatically accepted. I'd like it to be manually accepted by the owner of the resource, so I do: Create "fool" resource in kolab-webadmin with email ...
4
votes
1answer
400 views

how do I set up two smtp ports for postfix?

A CentOS 7 server with postfix, dovecot, and mailx needs to accommodate mail being sent through port 465 and received through port 25. What specific syntax and files need to be changed in order to ...
0
votes
1answer
67 views

How does the DKIM from SendGrid prevent me from spoofing my email adress?

I'm making use of SendGrid to send automatic emails. First I went to the whole hassle of creating a DKIM record, before I recently discovered the whole record doesn't seem to be checked anyway, ...
1
vote
1answer
123 views

Receiving empty mails from three different Windows PC's since 12 January, 2015

Problem Unexpected empty emails are sent by an unknown source since 12 January, 2015. Attempts to solve the issue they are all from company where I do network/sys support they are all from Windows ...
-3
votes
1answer
130 views

Sendmail - How to relay / send emails ? (503 error: not authorized, use AUTH)

I have been following a how to for setting up sendmail using a smart host ssrs.reachmail.net, However I cant seem to successfully send a email from my server to my gmail account. I think I'm ...
1
vote
1answer
47 views

If I create a virtual email alias that forwards a lot of spam email, is my IP at risk of blacklisting or the originating IP address? [duplicate]

A scenario of this would be something like a domain called domain.com has a mailserver set up that forwards all email sent to info@domain.com to person@gmail.com. If someone sends a lot of spam to ...
3
votes
1answer
168 views

Why am I getting these emails?

Awhile ago I noticed that email messages from my domain is not immediately delivers by google, and I'm getting an smtp error message from google server. I don not remember the exact wording of that ...
0
votes
1answer
35 views

Redirect email for redirected domain [closed]

I have two domain names with a registrar, one points to a server running plesk with a subscription setup to host the website. The second domain name simply redirects to the first using the registrars ...
0
votes
1answer
188 views

opendkim to sign all '*' users in a domain

How do you get opendkim to sign for all users in a domain? *@exmailer.com exmailmap in the signing table is not working for me. error: opendkim[1565]: 573D4A0D3D: no signing table match for ...
4
votes
1answer
81 views

Roundcube sends e-mails without subject

I have recently set up a mail server that consists of postfix and dovecot. Yesterday I added nginx and roundcube to the mix. SPF, DKIM, DMARC, rDNS records are all done. Gmail treats my mail as valid ...
-2
votes
1answer
110 views

Generating public/private credentials for MS Outlook email encryption

An app running on a CentOS 7 web server needs to receive encrypted emails sent from users of MS Outlook. Can someone please provide explicit instructions as to how I can generate or procure all of ...
0
votes
1answer
127 views

CentOS email setup for Wordpress

I am moving an old Wordpress install to a new CentOS LEMP stack VPS. I want to set up email for the new VPS. It came with sendmail installed by default but I find it to be overkill. I just need a ...
0
votes
1answer
50 views

Re-routing packets back inside the network on a SonicWall firewall

I have two wireless networks, one guest network which uses a 10.0.0.0 network to assign IP address to guests and one internal one who gets the IP address from the internal DHCP (let's say ...
2
votes
2answers
131 views

How to route select e-mails from Office 365 to another SMTP Server

I have set up an SAP system to act as an SMTP server on port 25000. The company uses Office 365 as its email provider. Is it possible to route/forward e-mails that are delivered to a specific e-mail ...
0
votes
0answers
12 views

Blacklist mail server [duplicate]

I have checked my IP in all spam lookup sites. those sites are DNSBL.info, spamhaus.org, barracudacentral.org, spamcop.net, blacklistalert.org and all of it says that I am clear. But when I checked it ...
-4
votes
6answers
2k views

Remove blacklist from spamRATS

I have checked my IP in SpamRATS and the result is the following: Standards Compliance: Does IP Address resolve to a reverse hostname... Passed! Does IP Address comply with reverse hostname ...
-2
votes
1answer
48 views

Individual accounts being spammed on server, even though DNS not hosted [closed]

Disclaimer: Please pardon the newbery! I've got a dedicated linux server from HostGator that has around 100 accounts on it. Lately, dozens of these accounts get bombarded with junk mail a few times a ...
0
votes
1answer
38 views

Exchange mail flow rules for signatures

I've recently implemented an html signature using transport rules in exchange 2013, that appends given signature as a disclaimer to all emails from a given sender domain. The problem is that the ...
0
votes
0answers
10 views

Google Apps for business ALL bcc

I did not get an answer from Google Apps team. Hence asking here. Like in Postfix we have an All BCC email option where every email sent and received of a domain will be BCCd to an email id, can we ...
1
vote
1answer
144 views

Postfix - relay locally generated mail but accept mail incoming from GApps for the same domain

I know the way to disable all local delivery is to remove the domain from "mydestination", which will cause all mail to be relayed through whatever relay I setup. But I want postfix to accept all mail ...
0
votes
2answers
124 views

I am able to receive mails but unable to send via my SMTP server?

I have a shared hosting server from hostgator, in which I created an email 'support@mydomain.com'. Then I enabled both DKIM and SPF (as I read on a few threads that SPF should be enabled to ensure a ...
2
votes
2answers
124 views

PHP emails, Postfix and Message Queue

I've been running a web platform that needs to send a considerable amount of emails daily. At the implementation date I and my partner decided to setup Postfix on the server and use Swift Mailer class ...
0
votes
1answer
69 views

Can't login via IMAP after creating user via useradd command

I'm trying to create a new user (that can access email) with useradd. My command is useradd --shell /bin/bash --create-home --password <password> <username> However, I cannot login to ...
-2
votes
1answer
220 views

Postfix POP3 NOQUEUE: reject: RCPT error

I am getting an NOQUEUE: reject: RCPT error when trying to send mail via POP3 and Postfix (note: IMAP works fine). Feb 21 06:57:04 r2d2 dovecot: pop3(br@telecomm.com): Disconnected: Logged out ...
1
vote
2answers
367 views

Can't connect with telnet from external ip

I have a postfix server running on a kimsufi VPS, i installed roundcube on it, and everything is ok. The problem is, when i try to connect from another server, i have a timeout : telnet whys.fr 25 ...
5
votes
1answer
147 views

Postfix stops picking up mails at night

Our postfix system stops sending mails at night. Every night at 2am it stops picking up mails. The server is a monitoring server, which sends a lot of mails per day. /bin/mail drops the mails in the ...
1
vote
1answer
161 views

Postfix using virtual.db file instead of mysql table

I have specified virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf, but still I got errors like warning: hash:/etc/postfix/virtual is unavailable. open database ...
0
votes
1answer
305 views

How can I configure a Haraka mail server to forward mails to another address on another domain?

I'd like to setup an Haraka mail server on a domain (let's say 'example.com') that will only act as a forwarding service to a 'gmail.com' email address. For the sake of the example let's say I'd like ...
0
votes
0answers
33 views

When using an “Internal Relay Domain” as an Accepted Domain, what email addresses must be synched?

There are a number of SMTP addresses associated with a user in Exchange SMTP, X500, X400, etc. In addition there is a LegacyDN. Some of these email addresses are stored in the NK2 files and also in ...
0
votes
1answer
61 views

What happens to local email when user does not exist

I'm running a server with postfix to handle email sent from a php website. Email for the domain is handled by another server, however due to the fact that this domain name has been entered in ...
1
vote
2answers
212 views

mx server: multiple domains on one ip

I'm just a bit confused about the correct DNS setup for hosting multiple domains on a single server with one ip. For example the mail server (domain/reverse: example.com) should host 3 domains: ...
0
votes
1answer
144 views

SPF records when sending multi-domain emails from one host

We have a CMS system in which multiple customers run their websites from a single virtual machine. Pages generated by the CMS allow forms to be filled in, which trigger emails to be sent. I am having ...
0
votes
0answers
41 views

Exim4 can not send mails via mail client

I'm using Exim4 as my smtp server, in my case, I can send e-mails to any mail accounts from my smtp server, but when I tried to use Thunderbird to send mails, it shows the following error. Sending of ...
-1
votes
1answer
42 views

change Domain MX

I have a windows server and I set my domain name servers to this server. now I want send email from another server, really my web application and mail server aren't on a same server. the mail server ...
1
vote
1answer
260 views

com.sun.mail.iap.protocolexception no login methods supported

A JavaMail app and dovecot/postfix/mutt are running on the same CentOS 7 physical serverbox. This JavaMail app was able to reliably import emails via IMAP using the same exact code until some changes ...
1
vote
1answer
198 views

postfix | sender_bcc_maps for specific emails (with attach)

How, if possible, copy all incoming mail with attachments to mybackup@example.net If I use sender_bcc_map = type:table - all mails will be copied, without attachments too. I do not need that, I just ...
4
votes
0answers
495 views

Why Outlook, Hotmail and Live return 250 Mail queued for delivery, but they never deliver it?

Ok, i've been seeing this the last week, tought it could be gone in a few days by itself, since i wasn't blacklisted and my DNS entries are all ok, but when i try to send e-mails to some user at ...
1
vote
1answer
258 views

How to change mailx?

I am having a problem in my VMs. I used the same template (Debian 7min) in OpenVZ, but for whatever reason those two are using a different mailx. I have a small script which I use to send ...