Unable to receive email in mailcow

geethu

Hi i have ec2 instance on which i have installed mailcow image, i am able to send emails but unable to receive emails

Name Type Correct Data Current State
mail.enscryb.energy A 3.249.219.101
101.219.249.3.in-addr.arpa PTR mail.enscryb.energy ec2-3-249-219-101.eu-west-1.compute.amazonaws.com
25.tcp.mail.enscryb.energy TLSA 111: Connection refused 3 0 1
enscryb.energy MX mail.enscryb.energy
autodiscover.enscryb.energy CNAME mail.enscryb.energy
autodiscover.tcp.enscryb.energy SRV mail.enscryb.energy 443
autoconfig.enscryb.energy CNAME mail.enscryb.energy
enscryb.energy TXT SPF Record Syntax
?
v=spf1 mx a include:_netblocks.mimecast.com _all 2
dmarc.enscryb.energy TXT DMARC Assistant v=DMARC1;p=reject;rua=mailto:mailauth-reports@enscryb.energy 2
dkim.domainkey.enscryb.energy TXT v=DKIM1;k=rsa;t=s;s=email;p=

AWS team confirmed they opened port 25, but when i try telnet ubuntu@mail:~/enscryb/mailcow-dockerized$ telnet 3.249.219.101 25
Trying 3.249.219.101…
telnet: Unable to connect to remote host: Connection refused

Appreciate any help

To add , i am able to receive email when i try to send an email from the same domain in admin mode from system emails.(noreply@mail.enscryb.energy)

DocFraggle

geethu i have ec2 instance

BTW; this is not a supported platform.

https://docs.mailcow.email/getstarted/prerequisite-system/#supported-os

esackbauer

From outside, port 25 is not open. Either this is an AWS firewall issue, or your mailcow is not properly binding on port 25.
Check with this command:
ss -tlpn | grep -E -w '25|80|110|143|443|465|587|993|995|4190'

You should see a line like this:
LISTEN 0 4096 0.0.0.0:25 0.0.0.0:* users:(("docker-proxy",pid=3218228,fd=7))

That would indicate that Docker/mailcow properly is listening on Port 25 on any IP address. I hope there is no other docker container outside of mailcow binding to that port.
Also disable any firewall on Linux like UFW or firewalld and disable SELinux.

esackbauer

DocFraggle this is not a supported platform.

I guess it could be done:
https://aws.amazon.com/marketplace/pp/prodview-g5rooj5oqzrw4

[unknown] ubuntu@mail:~/enscryb/mailcow-dockerized

Looks like you did not follow the installation instructions properly. You installed mailcow in a user directory.
You must install as root user. And it should be in like /opt/mailcow-dockerized
Maybe the problem comes from that…