1
vote
2answers
30 views

Advance DNS - Redirecting Emails to new webhost

I am not to sure if this question belongs here but I will surely find out soon enough. I have two web hosts (Not sure why it has been setup this way but it has). I do not want to use the original web ...
0
votes
1answer
54 views

MX records to ensure failure of email delivery

I'm managing a set of domain names that used to have MX records pointing to a hosted mail service. When the hosted email service was deactivated, emails sent to the (now invalid) addresses resulted in ...
0
votes
1answer
158 views

Is it possible to receive inbound emails using Mandrill?

I am using Mandrill mail server for sending emails to users and I have my own domain added to Mandrill to send out mails. Suppose I have configured Mandrill to use info@mydomain.com to send out emails ...
0
votes
1answer
37 views

What domain to set in rDNS

I have a few different domains on a shared IP address. One of them is having trouble sending email, as certain mail servers reject the email for not having rDNS set up properly. The thing is there ...
1
vote
2answers
39 views

Postfix sending and receiving in strange way.

I have an email server, running on CentOS 6.5, 32bit system, with Postfix and Dovecot running along all their dependencies. Let's assume my domain is www.anw.com I have created A record in this ...
-1
votes
2answers
31 views

Handling emails in a separet email servers [closed]

This is a problem about maintaining an all-email VPS server. First, I have two VPS hosts right now, both running CentOS 6.5, 32bit system. one for web hosting and other for email only. The reason ...
0
votes
1answer
51 views

Setting MX entries for Failover [closed]

I have a GoDaddy domain as "example.com". I wanted to have my own DNS server for the sub domain secure.example.com. So I added a "A" record "NS" pointing to my IP and a NS record "Secure" pointed to ...
0
votes
1answer
71 views

Mail Server with different IP than Web Server [closed]

I recently had a problem. Somebody hacked a Wordpress Site of one of my customers and sent about 70.000 Spam Emails. So my Server IP got blacklisted on some Providers. I'm looking now for a solution ...
0
votes
2answers
92 views

Gmail as stand-by mail server for Exchange for incoming emails

How to configure MX zones to utilize Gmail/Outlook as stand-by incoming mail server with my active Exchane to provide reliability? Gmail/Outlook should only be used in case of Exchange is ...
0
votes
1answer
26 views

Format of mail-server PTR record in order it to be valid for spam filters?

I am aware that lot of e-mail spam-filters will check the PTR record of the mail-server IP address. However, what are the exact requirements for this PTR record? Is it enough if the PTR record is ...
0
votes
1answer
65 views

Setting up server for Google Apps? [closed]

So I am currently running CentOS 6 and trying to figure out how to get Google Apps (gmail) to work. I am completely new to mail server software but have a general idea of how it works. What software ...
-1
votes
1answer
32 views

Seperate simple email server and dedicated http server

I've setup a new dedicated server (Ubuntu) to host my sites from so I can build more complex web applications but I don't need nearly as much complexity from my email setup. Is it possible to split ...
0
votes
1answer
76 views

Reverse dns and SaaS Spam Filters

We have an exchange server in the office that for a year or so has just used the built-in spam filters - we have added the SpamHaus IP addresses so that some basic spam filtering is done. However, ...
1
vote
1answer
81 views

Foward mail to different domains using Postfix - all domains hosted on same server - external email hosting

I have one server hosting several domains - one main domain and several alias domains. Domains main.com alias1.com alias2.com I use the domain name registra's (Gandi.net) email service for the ...
1
vote
2answers
3k views

Install Zimbra, can't use current hosts file

I'm trying to install zimbra on a linux server. I downloaded the Ubuntu 12.04 LTS version of zimbra, unpacked and tried to run install.sh. But after I have approved the license I get this problem. ...
0
votes
3answers
179 views

change DNS but keep email server

I currently have my client's website hosted in china and the domain is hosted in www.net.cn I've purchased an inmotionhosting plan and i want to move the website there. For having the website ...
-2
votes
3answers
137 views

How are domain registrars able to include unlimited DNS and email forwarding? [closed]

DNS services on average cost $30/year for 600,000 queries per month. Email forwarding is about $30/year for 10,000 emails a month. How can a registrar, whom I pay only $10/year for a domain, be able ...
0
votes
1answer
64 views

Implementing SPF for a mail server that sends email on its own, with GoDaddy

I have some troubles configuring SPF/DKIM for a VPS with a running instance of Postfix. Thanks to DMARC reports I'm finding and fixing always more issues. Today I have a problem by setting SPF ...
0
votes
1answer
979 views

What is wrong in my DKIM setup? I'm getting all fails

I own a domain name I have implemented SPF and DKIM to avoid my mails being junked. I have also upgraded to DMARC in monitor mode. Since I received a few failure reports recently I wanted to ...
0
votes
1answer
301 views

Mail server, binding postfix to an IP address, network unreachable

I configured a DNS service using bind. It works and I created a domain named test.com . The problem is not in how I configured bind, I already have a positive feedback: I tested it using dig, which ...
-1
votes
1answer
873 views

Do I need to have multiple MX records that point to different IPs that are in different subnets even if I only have one dedicated server?

I own and operate a single dedicated server that offers shared web hosting space to my clients including email services. Is it possible to have multiple MX records for each client domain, and have ...
0
votes
1answer
47 views

Mailserver DNS and rDNS setting

Let me start with the fact that things are quite weird in our organization. Now, we have to place a mailserver for a DNS zone that is under our control, for example xxx.yyy.zzz. However, we can't ...
0
votes
0answers
494 views

Setting up Smartermail SMTP Banner for multiple IP / hostnames

I use Smartermail Enterprise 10.7 and I wonder how to set SMTP banner for my server which has 5 different IPs, each has its own PTR point to different domain. what cause the SMTP banner only match ...
3
votes
2answers
2k views

Can an email server be set-up on an Azure VM?

I am considering the possibility of setting up a simple SMTP+IMAP email server for internal use on an extra small Azure VM. When I say internal use I don't mean "used by internal users", but for use ...
0
votes
2answers
83 views

Keeping mail and website separate on single server

I have a single server (single ip) running apache, bind and a mailserver. This serves a single domain (mydomain.com) and I would like to associate www.mydomain.com and mydomain.com with my website, ...
4
votes
1answer
142 views

SPF records issue

I have an SPF record set up for my domain eg: v=spf1 a mx include:mydomain.co.uk ?all However, I now have to add an SPF record for a web based invoicing system which wants me to add the following ...
0
votes
3answers
909 views

Dynamic IP and MX Record

I have read that I "must not" use CNAMEs in MX record entries. My in-house mail server is connected to the internet with a provider where the IP changes every two/three months. I have a subdomain ...
1
vote
1answer
503 views

When pointing to new DNS servers is there any chance of E-mails being lost even if the old E-mail hosting service is still up?

I am changing webhosts and will be using the new hosts mail servers instead of the old ones. I have created all the correctly named mailboxes on the new service but have also not yet cut ties with ...
1
vote
4answers
365 views

How do SPF records reduce spam?

How do SPF records reduce spam? Note: I'm not asking how to setup an SPF record; I already know how to do this. Does the receiving mail server lookup the SPF record and determine if where the mail is ...
2
votes
1answer
8k views

451 #4.1.8 Domain of sender address does not resolve

When sending out email to xxx@terremark.com through my own SMTP server (mail.sarit.be), the receiving mail server replies with: 451 #4.1.8 Domain of sender address <xxx@sarit.be> does not ...
2
votes
2answers
205 views

MX record for one domain so that other domain can send with the same from

I have two domains: d1.tld and d2.tld. I would like to send emails from d2.tld with the mail from user@d1.tld How should I set my MX record so that receiving mail servers will accept the message? ...
2
votes
1answer
7k views

Domain of sender address does not resolve (in reply to MAIL FROM command)

When sending out emails with postfix I sometimes get this error: 451 #4.1.8 Domain of sender address <user@mydomain.tld> does not resolve (in reply to MAIL FROM command) The domain ...
1
vote
3answers
3k views

SPF record when sending mails from two different IPs

I have somedomain.com on IP 1.1.1.1 I send/receive mail using Outlook connecting to mail.somedomain.com So my DNS records for somedomain.com are the typical: www.somedomain.com >>> A ...
1
vote
2answers
1k views

Hosting multiple domains on a single email server with one IP

I have an email server (mail) that currently hosts one domain example1.com. The server is behind NAT and I have split-dns configured on the LAN. The time has come to host additional domains on the ...
1
vote
2answers
143 views

SPF Record for sending mail for a different server

I use a different server to send mail to my mailing list. I want to add an SPF record to my domain to show that the IP of the different server is authorized to send mail (as well as the default ...
0
votes
2answers
796 views

Setting up DNS for e-mail serving

I have a CentOS6 Server and wanted to install Zimbra 7. I was getting an /etc/hosts error and found out that I need to run a local DNS Server due to split-dns issues. I installed Bind and am trying ...
4
votes
5answers
2k views

How do I move my website to a new server without interruption to email?

I have a corporate website on a server that also hosts all our email. I have no idea how diligent all the employees have been about backing up their email / leaving old messages on the server, etc. In ...
1
vote
1answer
303 views

using own mail server with external domain and dns. Now have internal dns. dkim test not working

I am not very knowledgeable in this area, but have been able to make great head way. Now i am stuck I setup my own mail server, e.g mailbox.example.com. I had the domain dns point to my mail server ...
1
vote
1answer
179 views

Changing servers, want to make sure Googlemail doesn't go down

We are currently moving from one server to another. I'm new to DNS and server admin which isn't ideal I know! This is how our current working domain is set up for email with Google apps: ...
-1
votes
1answer
634 views

mxttolbox SPF check - showing - all fail & Rest ptr a mx are Passed . What is the reason

Newly created spf record for one of our domain . texxxxx.com goes like this teXXXXXX.com v=spf1 a mx ptr ip4:189.123.111.000 mx:teXXXXX.com -all ( not real values) and mxtool spf check ...
2
votes
2answers
143 views

Can a DNS pointer return several domain names on one ip lookup request

We have an MS Exchange deployed on an ISP network in our office. Currently, when a mail recipients' server would try to lookup an IP of the server, from which it is receiving a message, that is marked ...
2
votes
3answers
4k views

Email Server IP Address is Blacklisted

we have a Zimbra Mail server that was being used for 2 months now. the last week we faced a problem that the Public IP that was being used for our mail server started to be blacklisted and we couldn't ...
0
votes
1answer
253 views

want to Request our ISp to do rdns/ ptr modify for my Staic IP ot point to my Domain?

we setup a mail server in our local office using Mdaemon Mail Server . We have a Staic ip 123.xxx.123.xxx ( as an example ) and all necessary ports (80 , 25 , 110 ) are made open . We have a ...
0
votes
2answers
257 views

Cannot Receive Email - Troubleshoot DNS

I'm somewhat green when it comes to network administration, and I'm having some trouble configuring my DNS records so that I can receive e-mail to an e-mail server that I've recently set up. I'm able ...
1
vote
1answer
204 views

Is it possible to use one wildcard subdomain for both Web and Incoming Email?

Is it possible to use one wildcard subdomain for both web and incoming email? So, for instance: random01.example.com => handled by web server user01@random01.example.com => handled by email server ...
11
votes
4answers
6k views

Do SPF Records For Primary Domain apply to subdomains?

I have a quick question regarding SPF records: Do they need to be present for all subdomains? Lets say that I have a TXT record with SPF info for domain.com Let's also say that I have a seperate ...
2
votes
1answer
175 views

What domain should I use for reverse DNS PTR record?

If setting up a mail server. What is the best domain to use for the IP's PTR record? Is it usually better to use "mail.domain.com" or just "domain.com" ? I understand that If the PTR record is set, ...
0
votes
1answer
374 views

IIS6 SMTP service attempts to send mail to domain root A records instead of MX, why?

Getting some random bouncebacks on e-mail processed through an IIS6 SMTP service acting as a smart host (outbound mail gateway). Configuration example... For domain example.com we there is a Root A ...
0
votes
2answers
183 views

Where can I find a comprehensive guide for starting to understand and use SPF records?

I haven't done much with SPF records before. I understand that the concept behind them is to specify which servers (ip's) are allowed to send mail signed "from" a particular domain - which is ...
0
votes
1answer
55 views

How to show Google ads on parked domain and use that for emails too? [closed]

I have a parked domain where I would like to show Google ads, but Google wants that I put the domain on their name servers. I guess then they will point the domain to one of their IP. My problem is ...