All Questions
Tagged with domain-name-system email
515
questions
3
votes
1
answer
635
views
SPF record in DNS sending via Gmail
I have an old domain that I want to re-purposes for a new website which will send emails. I'm using Asp.Net Core, if that makes a difference (I do not think it does). I've written several apps that ...
- 131
0
votes
1
answer
60
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
votes
2
answers
433
views
How to set up a ptr record to allow my ip for sending email?
I'm trying to set up a raspberrypi 4 as a mail server.
Since I own a domain name using a provider (gandi.net), I use this domain name for my mail server (with mx records, redirection to the raspberry, ...
- 1
0
votes
0
answers
51
views
Change mail from header in sendmail
We have two separate RTs (request trackers) configured on one server. They both are configured to send the emails through sendmail.
We are trying to configure now SPF and DMARC records for these DNS ...
0
votes
1
answer
314
views
Gmail adds multiple SPF records
When I connected my domain to gmail, it added two records to my DNS:
TXT
@
v=spf1 include:dc-aa8e722993._spfm.mydomainhere.com ~all
TXT
dc-aa8e722993._spfm
v=spf1 include:_spf.google.com ~all
But ...
- 103
0
votes
2
answers
139
views
Correct hostname/PTR/A for a mail server serving multiple domains?
I am amalgamating a few of my company's Debian VPSs into 1. I will be serving multiple domains, as well as their sub-domains, all of which will send emails, but not receive them (except for bounces):
...
0
votes
1
answer
175
views
mx record with IPv6 AAAA host
I need to setup a mail server or mx record with a IPv6 address
I have written a AAAA record which is working fine (pings, ports) here
I have setup hmailserver and checked all ports(587, 143) with ...
0
votes
2
answers
210
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
...
1
vote
1
answer
312
views
How do i receive DMARC reports with external domains that i have no permission to control
I want to receive reports with gmail or outlook or anything else that i have no permission to add (mydomain.com)._report._dmarc.(gmail|outlook).com as a record. What i can do?
Example just like:
v=...
- 33
0
votes
1
answer
44
views
Can changing the DNS name of a postfix server damage reputation?
I was tasked with taking charge of all services at my current job after the person previously in charge left. Some of our services were using a domain name that's wholly in his possesion, not that of ...
- 113
0
votes
1
answer
401
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 ...
0
votes
1
answer
314
views
Do I need to have an A record to send/receive mail?
This is basic level question, I'm not running my own servers.
I've bought a domain name, but I wonder, do I also have to buy hosting with an A record, or I can just configure DNS mail records in the ...
- 115
0
votes
1
answer
39
views
Are SPF records checked depth first or breadth first (or something else)
We have a domain which has 11 includes; so is failing SPF validation as it's gone over the limit.
Most of the lookups are for third party resources, so flattenning the SPF record isn't ideal; we'd ...
- 1,278
0
votes
1
answer
81
views
Migration plan for hosted e-mail
I am considering migrating my e-mail from one hosted provider to another; specifically to Proton Mail, but I don’t think that matters. My trepidation comes from my personal domain and the potential ...
- 147
1
vote
0
answers
44
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
223
views
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
vote
1
answer
50
views
Single server, single IP, mail with other services -- do I need a mail subdomain?
I have a server with a single IP configured to act as a mail server and to provide other services (e.g. http).
DNS records are like:
mail.example.com A 192.0.2.4
example.com MX mail.example.com
and a ...
- 208
-1
votes
1
answer
57
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 ...
6
votes
1
answer
10k
views
Gmail does not accept mail from a new VPS server with PTR setup
I have PTR records setup but I am not able to deliver mail to Gmail accounts:
host gmail-smtp-in.l.google.com[2607:f8b0:4004:c08::1b] said:
550-5.7.25 [2a01:4ff:f0:a7b6::1] The IP address sending ...
- 163
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 ...
- 1,295
0
votes
1
answer
735
views
Network Solutions DNS not always returning DKIM and SPF records
If there is a more appropriate place to ask this or it is a duplicate, please tell me.
I have a client who hosts their domains with Network Solutions. Some of their emails were bouncing due to ...
- 281
1
vote
1
answer
3k
views
Email DNS Setup: How do I make HELO publish an SPF record? SPF_HELO_NONE - SPF: HELO does not publish an SPF Record
My environment: hMailServer 5.6.8 on Windows Server 2022 Standard
Let's say I have two domains (I don't really own these domains, they're just examples), www.myblog.com and www.mailserver.com. They ...
- 133
-2
votes
1
answer
58
views
Verifying my email provider seems to have broken my web site
I read that it would be desirable to "verify" my email provider (zoho), so according to their instructions I added the following records to my DNS (CNAME code altered slightly):
CNAME ...
- 477
0
votes
1
answer
521
views
Mailgun : Sending a message from a subdomain to main domain gets denied
I've set up a subdomain in mailgun to send transactional emails from an application (mq.domain_name). This seems to work fine, as long as a receipt's domain is other than the main domain we own, for ...
- 101
1
vote
0
answers
3k
views
Postfix mail server not sending email
I had a postfix server that I had to restore from a backup and deploy onto a new server. Using the new server, the domain name is not allowing me to send email. I am able to receive emails but sending ...
- 13
0
votes
0
answers
35
views
How can I stop mail DNS records from showing my main website? [duplicate]
I’m relatively new to all this, so please bear with me. Most of everything I know is based on guesswork, following tutorials, trial & error…
Anyway, I have a pretty basic LAMP server going on ...
- 1
0
votes
1
answer
1k
views
Postfix and Subdomains
I set up Postfix on an Ubuntu 20.04 machine. However, I am not sure where I have to use the subdomain and where the domain. Let us call them mail.example.com and example.com respectively.
The system ...
- 103
2
votes
1
answer
165
views
What's the endpoint running at `include:spf.example.com` as seen in an SPF record in DNS?
How can I run an SPF include endpoint for my organisation?
In this example, the SPF record for a domain permits hosts included via the spf.example.com list, and prohibits everything else:
"v=spf1 ...
- 123
5
votes
1
answer
5k
views
why is this DMARC failing verification?
I get a 6.1/10 score on mail-tester.com, where the DMARC verification is the only relevant penalty (-3).
* Your DKIM signature is valid
* Your message failed the DMARC verification
A DMARC policy ...
- 153
0
votes
0
answers
312
views
postfix not accepting mail from new domain
Okay, so I set this mail server up myself on a virtual private server, and it was working, properly receiving mail from three separate domains (for months). Now though, I've tried adding another ...
- 1
1
vote
1
answer
422
views
Mails not received when using Cloudflare DNS and Cpanel server [closed]
I have the following Cloudflare DNS config:
The mail and ftp are hosted on the Cpanel server. The website is hosted on a separate server, on a VPS. You can see in this image that the mail A record is ...
- 151
1
vote
1
answer
96
views
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 ...
7
votes
2
answers
2k
views
Base64 encoded MX records in TXT records
A lot of domains hosted by Namecheap contain strange DNS TXT records that appear to be base64 encoded, that when decoded look like a weird kind of MX record - having the structure of both a priority ...
- 171
0
votes
1
answer
234
views
Change only 1 emails DNS to use another server but keep the other ones in my server [closed]
So I came across a weird problem and I don't know if there's a way to solve it or not
Basically, I made a protonmail.com account and changed the DNS servers in my cPanel to theirs
Now, everything ...
0
votes
1
answer
846
views
Do I need to set a MX record with both my domain registrar & hosting?
I have a GoDaddy registered domain and am using the GoDaddy O365 email.
I am moving to a different host for my website, so I have changed the A record in GoDaddy's settings to point to my shared ...
0
votes
1
answer
760
views
Deliver mail to certain MX
We have a strange problem.
Our Exchange (old guy Exchange 2010) server doesn't deliver mail to certain address.
When checking I see that the domain of recipient has 2 MX records
MX 10 good.server
MX ...
- 139
0
votes
1
answer
1k
views
Reverse DNS for multiple subdomains
We're setting up a system where each of our users gets their own subdomain of companymail.com for sending / receiving emails, and they can set up multiple mailboxes under that subdomain. We also want ...
- 113
2
votes
1
answer
1k
views
Correct SPF record to avoid softfail for emails sent from domain address using Gmail?
I have a domain address, such as [email protected], which forwards to Gmail.
Gmail is configured to 'send email as' [email protected], using example.com's SMTP server.
Emails sent from Gmail as me@example....
- 121
17
votes
2
answers
3k
views
DNS MX/SPF/DMARC records without actuall emails on domain
I created website for someone, but also someone (I guess some SEO guy) told this person that I made big mistake because there are missing DNS records on domain (mx, SPF, dmarc). Now I need to "...
- 273
-1
votes
2
answers
52
views
Understand the concepts needed to send emails with a custom domain
My question today has to do with me not knowing the names/concepts of the things I probably need to fiddle with in order to achieve my desired result:
To be able to use [email protected], alias2@...
- 99
-1
votes
1
answer
75
views
For redirected domains, what DNS records are required?
This applies to my VPS that runs both the web server (nginx) and email server (dovecot + postfix) for several domains.
Hypothetically, suppose that I have domain company.com, and that I additionally ...
- 125
0
votes
1
answer
2k
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
-1
votes
1
answer
225
views
mail can be send and received from outside network but mail (outlook or webamil ) not accessible from local network
my private block is 192.168.109.0/24
WAN is 82.198.x.x. and mail server is on 192.168.109.x.
I have made the rules dst-nat for port 25,587,993 and 143 with destination 82.198.x.x forwarded to the mail ...
0
votes
1
answer
183
views
Local mail exchange with DNS servers
I have a problem with correctly setting up a working infrastructure for testing mail spoof preventing mechanisms.
As stated in a graph below, I have 2 mail servers (centos1 & 2) and 2 DNS servers. ...
- 19
1
vote
1
answer
644
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.
...
- 11
1
vote
1
answer
166
views
Postfix subdomain can send, but not receive external email
I'm setting up an AWS EC2 instance, and I need the server to be able to receive emails. Let's say that I am setting up email on the subdomain mail.myserver.com.
I have Postfix installed, and I can ...
- 363
-1
votes
1
answer
193
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
181
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
131
views
mx record mail server coming back as something else so cert isn't correct
I'm adding a certificate to my mail server and everything works fine, except I am getting an error when using www.checktls.com to make sure everything is running correctly.
This is the error from ...
- 123
0
votes
1
answer
38
views
PTR recored Issue
We have 2 Mail servers ( Internal and External) the External is hosted by ISPA with ip address of 62.xxx.xxx.xxx, we use to have the internet from the same ISPA, and the PTR record is already setup.
...
- 1