All Questions
Tagged with email-server domain-name-system
226 questions
0
votes
2
answers
51
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Setting up DNS for routing mail to corresponding subdomains
I'm trying to configure DNS for handling mail across multiple subdomains, where each subdomain has its own mail server. My goal is to route mail for user@%subdomain%.example.com to the server hosted ...
- 3
1
vote
2
answers
104
views
Configuring an email server with multiple domains
I have a single server where mails are processed, and I'd like to use multiple domains.
For example, if the domains were example.com and example2.com, and I had the following DNS records set up:
mail....
- 121
0
votes
0
answers
73
views
postfix doesnt deliver nor receive mails
I set up a docker container (mailserver/docker-mailserver) on my server.
Postfix is giving me the following log when I try to send or receive a mail:
2024-07-30T17:40:01.753276+02:00 mail postfix/qmgr[...
0
votes
1
answer
123
views
SPF record is set, but mail testers are giving me high severity risk
I'm using sendmail and I have the following SPF record:
"v=spf1 a mx a:hostinger.com ip4:ip_here -all"
And it gives me this description:
domain.com. 14400 IN TXT v=spf1 a mx a:hostinger.com ...
- 123
1
vote
1
answer
208
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Can I have more than one public keys saved in one selector for dkim?
The question is easy to understand, but it might be confusing. I understand that I can host multiple selectors for a DKIM record, but just out of curiosity, can I have multiple keys per selector in a ...
- 205
0
votes
2
answers
201
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I can't seem to point the correct nameserver to my VPS
I'm hosting my domain on Namecheap and im trying to point my nameservers to connect to my VPS using Webuzo (on Hostinger)
it shows this error on my VPS on Webuzo:
" This system does not control ...
- 1
0
votes
2
answers
477
views
Why is PTR needed in DNS, instead of using a service record or an MX record?
Why would an organization with an email system have a requirement that a system sending email to it needs a PTR reverse lookup DNS record of the IP address of the sending email server?
Can the ...
- 101
0
votes
1
answer
143
views
Adding MX record
I would want to achieve the following: I have acquired a domain name, and I would like to add a website and a mail server for this domain. I have: 1 Domain name, 1 private Ubuntu server with IP, 1 ...
1
vote
3
answers
110
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What is the difference between a query for a TXT record and a query for a TXT record against a particular name server?
For the purpose of implementing an email server, I want to be able to look up a domain's DKIM record.
What is the difference between these two sets of DNS queries? Which should I choose to implement ...
- 19
0
votes
1
answer
245
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Mail server running on a subdomain - how could email acceptance by other servers be influenced by dns records for different ips?
I started to run a self-hosted mail server which I want to be reachable via a subdomain only. I have an A record for mail.sub.domain.tld and an MX record for sub.domain.tld /edit: which points to mail....
- 23
2
votes
1
answer
626
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How to change A record in DNS and keep email working when MX record point to the domain itself
For my client, I'm migrating domain to point to a new website server. In order to do that, I'm changing A records to point to new server IP. After such change, client has lost possibility to send e-...
0
votes
2
answers
520
views
Root domain in SPF record instead of full hostname
Can i use root domain like google.com instead of _spf.google.com in SPF record?.
My SPF record
v=spf1 include:_spf.mx.cloudflare.net include:_spf.google.com include:mxsmtp.sendpulse.com +a +mx ~all
...
0
votes
1
answer
316
views
How to add multiple MX record from different Email server
I am using 4 mail services. Let say my domain is example.com
Amazon SES for Transactional Email - (Only Sending not receiving - SMTP)
Zoho Mail for workmail (Webmail) - (Users email, both sending and ...
0
votes
1
answer
612
views
One domain with several mx records, allowing some users to use Google Workspace and others to use roundcube from the server
All setup and MX records have been configured for the domain example.com, which I added to my Google Workspace account. I also own the website example2.com. These two domains belong to two separate ...
1
vote
0
answers
77
views
setting up a mail server for my domain
Learning about how mailing works in general and I have the following question:
If I own the domain bigmoon.com and I want to have a mail address that looks like [email protected], as I understand it I ...
- 111
1
vote
3
answers
332
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Different DNS server answer me different things
I am having problem with email going to "jslawglobe.com".
From certain email it always works. From others, it is a matter of luck.
After investigating the problem with one of those sender ...
- 111
-1
votes
1
answer
202
views
MX record pointing to different subdomains
Is it possible to have multiple email MX records for subdomains ?
eg:
domain: xyz.com - MX - Heartinternet emails
o365.xyz.com - MX - Office 365
gsuit.xyz.com - MX - Google
In this case do we have to ...
- 1
0
votes
1
answer
324
views
Where do I set up an MX record for my Google domain so it points to my email server?
I'm new to networking and servers, so I may be way off track. I have a Digital Ocean server with postfix configured on it. I also have a domain through Google Domains. I want to make it so my mail ...
- 113
-1
votes
1
answer
206
views
Have 2 domains point to the same mailserver with DNS?
Let's say I have an webspace with a mailserver at mail.webspace.com and an own domain called mail.mydomain.com.
mail.webspace.com is the domain I got from my hosting provider to enter for IMAP and ...
7
votes
2
answers
1k
views
How can I create and update the existing SPF record to allow more than 10 entries?
How can I include another SPF record if my existing domain already has 10 lines of SPF records in the TXT record?
I wanted to add these two:
include:mailgun.org
include:sendgrid.net
This is my ...
- 1,335
0
votes
2
answers
2k
views
send email from another server than FROM domain without being marked as spam
I want to send a mail from a website. The mail server from this domain is not publicly reachable, so I can't use that to send the mail.
The webserver that hosts the website has another email server ...
- 101
1
vote
1
answer
126
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Balancing with MX records - How does this work?
enter image description hereplease can you help me with this, I have this scenario to balance email traffic, currently, most of the emails are going towards imail2.test.com.pe and imail.test.com.pe ...
0
votes
1
answer
220
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CentOS webmail setup using Windows Server DNS
I'm having problems configuring CentOS7 to host as a mail server using Windows Server as a DNS, and cannot figure out where the problem is. The mail server and windows server are connected to a centOS ...
- 11
0
votes
0
answers
334
views
Setting up MX records for two servers with same hostname
In my DNS records, I have 5 MX records with my hostname being the main domain name of my site example.com. These 5 records are aspmx.google.com, alt1.aspmx.google.com, alt2.aspmx.google.com, alt3....
- 63
0
votes
1
answer
219
views
Different email addresses of same email server for sending and receiving
I am actually a fresher in terms of configuring an email server.
Recently I configured a Postfix email server combining with dovecot and squirrelmail on AWS EC2 centos server, following this guide:
...
0
votes
1
answer
3k
views
Somebody bought my old domain and I can't access my old mail
Over a year ago I decided to finally let go of a few of my old domains that didn't serve any purpose anymore.
Among those domains was my very first company domain that didn't have any use anymore as ...
- 19
0
votes
0
answers
1k
views
Do I need a PTR (rDNS [Reverse DNS]) record if using an SMTP mail relay (Mailgun, Mailjet, Send Grid, etc.)?
My cloud hosting provider wants to charge for setting up a PTR record, which I'm not up for.
As I use Mailjet as an SMTP relay server, do I even need to have it setup? Or will all my emails reverse to ...
- 219
0
votes
2
answers
338
views
Changing the IP address in the DNS record and then changing it back caused mail-tester.com to complain about no MX record
I have been asked to build a new email server to replace an older one. So for some testing I replaced the IP address of the old server in the DNS A and SPF records for the IP address of the new server....
- 15
1
vote
1
answer
843
views
Sendmail - retry instead of permanent failure on DNS errors
The last few days, our hosting provider has had occasional connectivity issues with one of their upstreams. Each time this happens, we end up with a heap of outbound emails that Sendmail gives up on.
...
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-1
votes
1
answer
235
views
DNS Records Configuration - Email Going Straight to Spam Box?
I know that in order to hit the inbox, the main DNS records need to be properly set up. These are the main DNS records that every mail delivery system should have for their domain:
TLS
A
MX
DKIM
SPF
...
-1
votes
1
answer
221
views
separate email server for the subdomain
I am having some serious problems setting up the proper DNS addresses for my domain.
My DNS records are like
mail A ip1 (shared hosting provider)
mail A ip2 (...
0
votes
1
answer
2k
views
Setup and use GoDaddy's email service from AWS Route53
Domain is registered in GoDaddy, nameservers are managed in AWS Route53, I want to use GoDaddy's email service.
Per the suggestion here, In Route53, I added an MX record with these entries:
0 smtp....
0
votes
1
answer
483
views
Reject email and force the sender to switch MX records
I am setting up a mail server solution.
I want to apply the scenario like this:
The domain used is configured with 2 MX records (one with priority 1 - my server and one with 10 - a third party STMP ...
- 3
0
votes
2
answers
735
views
How to make both the website and dockerized webmail work together on same server
I'm having new VPS machine where:
Install nginx on main host to serve my domain website (e.g. example.com) on ports 80,443. example.com conf in host nginx:
server {
server_name example.com www....
- 101
0
votes
1
answer
529
views
Inaccessible SMTP server, no error from mailer daemon
I would like to know what behavior should I expect, when I try to send an email to an address where the corresponding server has no working SMTP daemon instance running (for whatever reason).
My ...
- 3
0
votes
1
answer
666
views
Unable to send outbound emails both internal and external on new installation of Exchange 2016
I have installed a WINDOWS 2016 server and Exchange 2016 without EdgeTransport. This is only windows server in our environment so I created a new forest and new local domain.I have gone through ...
- 156
1
vote
2
answers
73
views
What DNS Changes should I make?
I'm moving a website to a new server. But I only want to change where the website is pointing to. So basically example.com and www.example.com. I'm afraid if I change the A record for @, mail will ...
- 131
0
votes
2
answers
652
views
Email,DNS, Subdomain issues
I am trying to spin up my own mail server (mail-in-a-box because it seemed simple) for myDomain.com. I spun up a Linode server & got port 25 open and mapped box.myDomain.com to redirect me to the ...
- 13
1
vote
1
answer
2k
views
IMAP Server Autodiscovery
I recently got a VPS and want to start using it to host my websites instead of the Shared Hosting packages that i'm using.
Question 1: Is it possible to setup Autodiscovery for the IMAP ...
0
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1
answer
228
views
How can I check if a domain's mail server is hosted by me?
I do have a reseller package at TSO Host that lets me manage web hosting for other domains. At the moment I'm trying to figure out if a specific domain that once has been hosted is still sending/...
- 103
0
votes
1
answer
521
views
How to properly configure Domain Delegation to send email through one domain with a FROM address of another domain
We're having some email deliverability problems and I've tracked it down to a couple of issues:
SPF/DKIM records are mismatched
Our app is sending mail from one domain on behalf of another without ...
- 1
0
votes
2
answers
1k
views
Bind (DNS) configuration is showing no error and still `dig` is not showing any DNS record (for SPF)
I have killed my few days trying to fix this issue but I cannot figure out anything to solve this.
So I have a VPS and it has Webuzo panel installed in it. I added few domains and also added the SPF, ...
- 101
2
votes
0
answers
264
views
WAN failover for local mail server
I have a question about possible failover solution for internet connection to local mail server in one small office where are problems with ISP. There is Kerio Control server with public static IP 1.1....
- 33
2
votes
1
answer
756
views
DNS Configuration for Web Server and Mail Server
I am new to computer networking.
I have successfully added MX record of email service provider (Yandex), and it works finely. Also I added A record pointing to the Web Server which installed on VPS.
...
1
vote
2
answers
5k
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Dkim record fails - A public-key (p=) is required
I setup dkim record using following tutorial.
But when I check the mx records using googleapps toolbox and dkimcore cheking tool it gives error
google says dkim is not setup, dkimcore says A public-...
-5
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2
answers
677
views
domain name system - rDNS is not exist [closed]
I need some help with Reverse DNS as I have got a problem with it. I have setup rDNS on my hosting provider which I use rdns1.example.com and I have a server hostname which it is gateway1.example.com. ...
- 101
0
votes
1
answer
247
views
multiple MX pointing to the same server
I need help for a mail server configuration.
I would like to know if it's possible to have multiple MX with different pub IP, pointing to the same local server.
this is because in my environment exist ...
- 7
0
votes
0
answers
157
views
Supporting multiple domains under one mailserver
I'm running my own Ubuntu server using Postfix to serve my email needs for a certain domain (let's call it domain.com). The mailserver does not have a mailbox, it forwards received emails to assigned ...
- 365
-2
votes
1
answer
2k
views
Correct DNS Settings for iRedMail (or other mail servers)
Given a fresh install of Ubuntu with a FQDN of example.com
$ hostname -f
example.com
If user installs iRedMail (or another mail server) using demo.example.com as their first mail domain name.
His ...
- 99
3
votes
2
answers
3k
views
Is a mail subdomain necessary?
I have just taken ownership of a domain which had a couple of associated email addresses. I have left the mail boxes with the previous host, and so have been looking at updating the MX records in my ...
- 39