I am new to DO and I have tried to look for solution online but I didn't find any answer. I am using Ubuntu OS 20.04(LTS)X64 version.
My question is that I have 2 droplets, MailServer droplet where I have installed docker composer and mailcow to run mail mails, and another droplet named WebServer hosting my domains. I have also set up all required DS records under my domain added on WebServer droplet and pointed A record mail.mydomail.com to the IP of mail server droplet. However, whenever I try sending emails they all bounce back unless the ones sending between mydomain users(user1#mydomain.com & user2#mydomain.com). It just says that "The IP you're using to send mail is not authorized.....".
Any support to help me solve this issue will be highly appreciated. An I am wondering if that approach is possible or if there is any documentation on how someone can set up dns records on one server and configure mailserver on another server using digitalocean.
Here is how I set my DNS on mydomain.com to point to MailServer IP
Related
I created a web app to do some basic content management for just myself. I want to mail some docs to the server instead of downloading then uploading them. Ive been looking at postfix but everything assumes you have a domain. Is it possible to receive email at a server with a fixed ip and no domain?
if you want anybody and any app to be able to send mail you need MX records in DNS. And MX records point at dns server names, not IP addresses.
https://serverfault.com/questions/663112/why-cant-mx-records-point-to-an-ip-address
If its just you then you can telnet to the SMTP port to send mail
I bought a domain.
I pointed his name servers to:
ns1.digitalocean.com
ns2.digitalocean.com
I have added a CNAME record point to #
I want to send and receive emails using my Mac mail program.
I know that I should probably build a full mail server which is an awful thing to do.
Therefore, I have another server (not digitalocean) running on cPanel. In this cPanel I have a very powerful cPanel's mail server.
How can I point my digitalocean CNAME to the remote server where the cPanel is?
I hope it's clear enough.
In order to make your domain points to the digital ocean server, you will have to create A record that points to the IP of that server, same goes to any subdomain.
Regarding your mail server, you need to make mail.mydomain.com points to the IP of your cPanel server using A record not CName and also modifying other records like SPF/DKIM records.
For your local mail client you can get the configuration by logging into the cPanel user account and view the mail settings
i have a big problem with the setup for an Domain.
The Webservices are established on our Server but the Mail functions are on a Server of an other Company when we now want send an Email over our Server he tried to send it localy insted of sending it to an other server so he give back an no account here error.
Thanks for helping me out and friendly greetings.
Edit: OS Debian 6
Imap: Courier
Send: Postfix
CP: Plesk
Further to this, we are using Plesk 11.5.3 on a setup where a single mail service is activated for all domains.
So each domain cannot have the mail service turned on or off individually.
We had the same problem as Franco, and we fixed this by running the following command for each domain that had external email:
# /usr/local/psa/bin/mail --off domain.com
Works perfectly, and removes any previously created local email addresses from Postfix.
"The problem is because the server will attempt to deliver emails for the domain name locally by default. To resolve that problem you would need to set it to use the domain name's MX record."
The simple answer is to disable mail services for the subscription.
Untick the box for "Activate mail service on domain".
I have no trouble sending out email with my EC2 server, but how can I check the email that is sent to me? I have an elastic IP setup and modified reverse DNS records. Do I need to install Postfix to receive email?
Ensure that port 25 is active and open on your server. Install an SMTP service on your instance ...postfix is mighty fine.
Ensure you have also set up some MX records if you want to receive email from the world...
I suppose the first thing to do is testing if you can open a telnet connection to port 25 on your server. Then you know if anything is listening for incoming mail.
If not, then you should probably install postfix as well as test your firewall settings (I seem to recall the EC2 having some sort of firewall setting for which ports to allow in the web interface)
edit: correct port number
I've recently setup my Ubuntu web server with exim4 so my PHP website applications can send email such as "thank you" and "confirmation" notices.
I've got it setup and working such that I can send email to gmail, Yahoo! and my work address. However, my work email gets caught up in our spam filter. I'm new to setting up mail servers so I'm not sure what I might need to look for in making this mail server more trusted, while keeping is secure.
Here are some details:
Server is NATed behind a firewall.
Firewall has port 25 open for outgoing SMTP traffic (from server to anywhere).
Server is virtual hosting a couple different of our websites
The server is running the following exim4 config:
dc_eximconfig_configtype='internet'
dc_other_hostnames='web-serv.example1.com;example2.com'
dc_local_interfacees='127.0.0.1'
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets='' dc_smarthost=''
CFILEMODE='644'
dc_use_split_config='false'
Questions:
Do I need to open port 25 to incoming SMTP mail (anywhere to server)? I wonder if other mail servers need to talk to my mail server to verify itself, in a sort of handshake attempt.
I have not created any MX records primarily because the server has different websites on it the mail server should send mail for all the websites. Do I need to pick/create a domain address and create MX records for it?
One thing of note is that the mail headers look like this:
Return-Path: <www-data#example2.com>
Received: from web-serv.example1.com ([Firewall public IP Address])
Received-SPF: neutral (google.com: [Firewall public IP Address] is neither permitted nor denied by best guess record for domain of www-data#example2.com)
"web-serv" is the host name of the server, such that you get this if you type it into the command line:
$ hostname
web-serv
and "www-data" is the account name for the Apache2 server that Ubuntu gave it as default.
Any other general advice would be appreciated. It's all new to me.
Cheers!
One item of note, since I posted this question time time ago (almost 10 months) is that I found out the biggest issue I had was with setting up the DNS for reverse DNS on our hosting providers side of things.
In other words, our hosting provider (the people who give us our IP address and manage our hardware) had to enter a record to match my server(s) hostname to whatever IP address it used.
There's a specific name for this. I believe it's a "PTR" record but the name escapes me at the moment, but you basically tell them "my server hostname is ..." and they do a quick update to the DNS for reverse DNS purposes.
When I asked this question, we had a different hosting provider who didn't really help explain this to me, and after switching providers, I got to talk to someone who was happy to help me understand that side of the equation.
And as I understand it, this is setup by the people who assign you the IP addresses. But there's probably more to it than that.
Once I got that setup properly, email had no problem getting through the spam filters and Gmail/Yahoo showed SPF as "passed". It was showing neutral before.
Our company email was set to drop any email that would not resolve reverse DNS, which is why I could not even receive the email or find it in the spam filter. Of course, that situation would be dependent on the company and what email policy and software they're using to manage spam. Some might just drop all email that does not reverse DNS and some might dump it in to spam filters instead.
Hope that might help some people with similar issues.
Cheers!