Questions tagged [mx-record]

The MX record is a type of resource record in the Domain Name System that specifies a mail server responsible for accepting email messages on behalf of a recipient's domain.

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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 ...
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Point A and MX records to different servers

The more I read the more confused I get, so please advise... I bought a godaddy domain. I have 2 servers, and I want the following... Justhost (Email) Digital Ocean (Web server for app) How can I ...
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Why would email deliver normally when MX Lookup test returns “DNS Record not found”? [closed]

Background: CentOS 8, Postfix, Dovecot, Digital Ocean droplet. My mail server can send and receive emails without a problem. My DNS records include an A, AAAA and MX record for my mail server. A ...
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SES MX record failing. Cannot follow naming convention in AWS help articles/support but not sure if that is the issue

I've got SES set up, the domain is verified, an S3 bucket is set up with proper write permissions, and a valid enabled receipt rule (all verified by AWS support). I was told by AWS support that my MX ...
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1answer
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Confused on DNS for G Suite + third party web host

I've been digging for an answer to my question, but my searches keep turning up edge cases, which surely this is not. As is often the case, Google's own support either over-answers or doesn't provide ...
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1answer
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Getting “Error: Invalid Value” while adding MX record in Google Cloud DNS

I am trying to add MX record in Google Cloud DNS but getting an Error Message Error message: ERROR Invalid value. Error NUMBER: d7422936167581091
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1answer
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Use MX records to forward all mail to specific server

I have two domains, lets call them example.com and example.de I need to have all emails sent to an (any) example.de address being forwarded to the example.com email server. Is it enough to place an ...
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2answers
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DNS: mx record with only AAAA, no A record

My mx record for example.com points to mail.example.com I have only set an AAAA record for mail.example.com, but no A record. I don't want to expose my IPv4, only the IPv6. I can receive e-mail from ...
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How to whitelist users at the MX server, instead of the mail server, using Sendmail

I am running Sendmail 8.15.2 on Fedora 30 with a MX relaying to a mail server. The relay-domains file works fine to funnel only the desired domains from the MX to the mail server. But the mail server ...
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3answers
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How to set MX record so that delivery results in temporary failure

I am moving an SMTP server from a host to another. In order to make things as simple as possible for me (and since I don't care if email are delayed a few hours), I would like to adopt this strategy: ...
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Have MX Record on same Domain with CNAME to AWS ELB

I am hosting my website on an AWS ec2 instance, and I have a ELB pointing to it. in my DNS-Conf on Domain.com, I added all the necessary Subdomains with CNAME records to that ELB. Everything works, ...
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DNS record setup

I recently set up my own mail server using postfix as MTA and dovecot as an imap 'server' (is this the right term?). Now dns records is the last thing to do and I was wondering if I understood this ...
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2answers
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CNAME domain to a subdomain with no MX reocrds

Should email to hello@test.com work? test.com CNAME something.else.com else.com MX 1 <google mx> I think there are some references out there requiring RFC1912 not having CNAME records along ...
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1answer
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Trying to receive emails AND store them into an S3 bucket

I'm trying to store emails i receive into an s3 bucket, i followed this tutorial and multiple others : https://docs.aws.amazon.com/ses/latest/DeveloperGuide/receiving-email-getting-started.html My MX ...
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1answer
125 views

Migrate email server with MX records

We need to migrate a mail server to another host with almost no downtime. My question is, if we set two MX records one to the old server and the other to the new one like: mail.xy 10 x.x.x.x mail.xy ...
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2answers
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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 ...
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1answer
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Can't use domain name to access mail server from outside LAN

Thanks for the assistance with my last post, it was able to work itself out nicely. Now I have another issue... I have got an A DNS record setup pointing mail.melia.tech to my public IP address I ...
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mail server mx record only shows dns ip

I am trying to setup BIND9 (Master and Slave DNS Servers), which I have done, and it is working as it should be (I believe). I can dig the domain name I am using and IPs and extract all the neccessary ...
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1answer
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Spam Email Delivery and MX Records

I hope this is an appropriate post. We've had some sites on VPS's hit with a recent hack. The hacks were cleared up, the sites were set as "devious/dangerous" by Google were re-scanned by Google in ...
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MX record delegation

I have a client who manages their own DNS - all the A records and CNAME records for example.com and a number of subdomains. They want to use a dedicated subdomain for email - em.example.com. They ...
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How to send subdomain emails to main domain?

I created a mail server (mail.mydomain.com) and can send emails from something@mydomain.com without any issue. But when some email addresses (which I tried to send email to) fail, bounce messages try ...
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1answer
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Where is email delivered if the domain on a shared IP has A record but does not have MX records?

Some say that an mail server can deliver email to the IP address where the domain is pointed to by A record even if the domain does not have corresponding MX records, though it is not recommended. ...
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1answer
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Why does CNAME for a root domain conflict with most other records? [duplicate]

As far as I understand, a CNAME record is served to retrieve only the A record of its destination. E.g.: www.example.com CNAME domain.com Here the DNS resolver will search for the A record (IP ...
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1answer
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DNS Setup with Azure and terraform - MX records non-functional

How do you set up a Domain MX record on Azure with Terraform's azurerm provider? When you set up an MX record, it is normal to make the name the FQDN "example.com." (at least with BIND). Terraform/...
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Postfix - MX: Host not found error but dig and nslookup are OK

I had a working Postfix email server on Centos 7 when I decided to reconfigure my host networking (IP addressing, DNS, etc.), after reconfiguration, mail sending is no longer working. /var/log/...
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Unrouteable Address with Office365

Before we get into the question, here's some context that I believe would help y'all to understand my situation better: My domain (foo.com), is owned by Network Solutions (NS), same for the DNS ...
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2answers
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Why MX record is not updating the correct A record

I've notice about cache in the ISP's but i wish know more about this and how to deal with that. I have more of 24 hours waiting my MX record update to the correct IP. Look this: I have an 5 priority ...
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1answer
551 views

Why do I see so many domains from businesses without MX records?

I'm doing internet servers for like 30 years now. The last three years I went back into operations and working with all the new infrastructure wonders. Feels really great. From time to time I am doing ...
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1answer
57 views

Mail sent from AWS going to spam

I'm running a number of wordpress sites on an AWS EC2 instance. One of the sites is using WooCommerce for an online shop. when an order is made a confirmation email is sent out but these mails all ...
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1answer
49 views

Spamassasin rule to flag certain MX IPs

I've noticed a flood of spam that is related to the same range of IPs. All the spam email has different HTML text (which is english but meaningless) and a few embedded pictures (which I block) but ...
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Google Cloud Platform Add New Record - IN MX Record without END .domain.com

I have a question. Can you help me? I hosting the website in Google Cloud and the DNS Record the MX Record is point the another hosting where I have the Mail Server, in these case is the Aplus.net. ...
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Mxtoolbox and sendmail

I create a server with sendmail and I realy need your help. I use sendmail for incoming and outgoing emails. I use ubuntu 18.04 and when I check https://mxtoolbox.com/SuperTool.aspx?action=smtp%3aslo-...
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638 views

List yahoo/hotmail email domains

Problem: I want to get/find a list of yahoo owned domain names that would, given the same local part, go to the same mailbox. And analogously, a list of such hotmail domains. Background: I have an ...
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Moving IMAP mailbox from a Linux server to G Suite

I have my old mailbox, which was hosted by my hosting provider. I want to move it to a new one, like G Suite. To access my old email, I used imap.mydomain.com server. I now moved my site to a new ...
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3answers
675 views

SMTP banner mismatch with multiple MX records

My gut feeling says "this isn't a problem and logically cannot really be fixed". I am configuring a backup ISP connection for use with our onsite exchange mail server. This is what I have set up: ...
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1answer
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AWS: How to properly set up mx record for website hosted on AWS S3 buckets?

I have a static website hosted in an AWS S3 Bucket. The website works fine. I've tried adding an MX record using '10 mail.domain.com' in every variation I can think of to write the record but I ...
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Email service migration from one provider to another

I am working on the email service migration from one provider(aplus) to another (GoDaddy). I have created the new email account at GoDaddy and completed migrating the emails from aplus's imap server ...
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1answer
126 views

Moving DNS hosting for Active site to Route 53 - with G Suite MX TTL of 1 week

I am following the steps outlined in this AWS guide to transfer my domain hosting from GoDaddy to AWS. Step 4 requires me to lower TTL for my existing NS Record to avoid downtime if I encounter issues....
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3answers
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Google DNS not updating MX or SPF information from 1&1 IONOS-hosted domain name

We made a change to one of our MX records on Saturday, August 17, and . the change propagated fairly quickly. When we run a DNS check against it, it appears that every nameserver worldwide has picked ...
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MX Record Cutover to Office 365

We recently migrated all of our mailboxes from Zimbra to Office 365, and we are currently running a split domain. I want to reconfigure my MX records to point to Office 365 while minimizing the ...
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1answer
32 views

NS change but MX points to domain

I will be changing the nameservers for a client to my server for a new website. I will be using Cloudflare as it also adds SSL. The problem is that he has an MX record pointing to mail.example.com. ...
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1answer
233 views

Mail migration from old hosting provider to dovecot

Unable to find a decent tutorial on this and the dovecot wiki doesn't seem to specify much other than the command line parameters for doveadm sync. I need to move emails from a hosting provider to a ...
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1answer
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Using Route53 for web hosting but moving email to 1&1

I have recently moved a domain from 1&1 to AWS Route53. On successful transfer, I've configured Record sets for MX NS SOA TXT CNAME My understanding is that from now onwards AWS manages web ...
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2answers
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MX Record Answer Contains Same Domain

What does it mean for an MX record to have an answer section that contains itself? My earlier belief was that this implies that a domain is it's own mail domain, but from running a couple experiments ...
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Updated MX Record Causing Bounce

We recently migrated our company to a new mail provider (Gmail), and updated our MX/SPF/DKIM/DMARC records. Checking the DNS propagation via https://dnschecker.org/, all changes are reflected. ...
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1answer
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Why postfix does MX lookup for relayhost?

I have in the postfix conf: relayhost = my.internal.relay.example.org All the mails transit through this relay. by default, postfix will try to do a MX lookup on my.internal.relay.example.org Why ...
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3answers
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secondary backup mail server

I currently have my domain on CloudFlare which is set-up with my one and only mail server, what i want to do is make so the new incoming mails are saved on both my main and second server, i read on ...
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1answer
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AWS SES dropping some emails frequently

Question: Would like some help on how to debug to find a point of failure where an email to be received by AWS SES might get dropped? (Please note: Problem is related to receiving mails via SES ...
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2answers
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Postfix: Name service error for name=domain.com type=MX: Host not found, try again

I'm stuck with a Postfix MX related problem. I've just migrated a very old Centos 5 server to v7 so I'm using postfix-2.10.1-7.el7.x86_64. I've upgraded the legacy postfix configuration (maybe the ...
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1answer
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Should I reject mail to test domains?

RFC6761 states about example domains (such as example.com): Application software SHOULD NOT recognize example names as special and SHOULD use example names as they would other domain names. ...

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