Unable to receive emails. IMAP connections times out

Support and Discussion
1

Hi,
I’m on vultr with latest build on Ubuntu 20.04. I set up a mail server and I can log in to the webmail and I receive emails wit no problem, but when I set up IMAP in Thunderbird, it does not connect and gives me a connection time out.
I read other help posts and and test using //email/testTo: and it tells me all errors and host is unresolvable message,

Captura de pantalla 2022-12-19 005318
Captura de pantalla 2022-12-19 005318824×476 35.9 KB

Any idea how I can fix this?
best regards,

2

Hello @ipoblete Happy you are here

There is no known record for plasticompostable.cl as seen in your screenshots. What is server domain?

3

where you are managing the DNS?

4

Hi, hope you’re fine,
Domain is plasticocompostable.cl
Best regards,

5

Did you setup mail.plasticocompostable.cl on CyberPanel? You should also add this subdmomain as rDNS record on your server (VPS/Dedicated server/Bare Metal server)

6

where you are managing the DNS?

HI, hope you’re fine too.
I’m managing and created at cyberpanel,
Best regards,

7

Your mail server is ok however you have this error

Cert VALIDATION ERROR(S): self signed certificate
So email is encrypted but the recipient domain is not verified

You will need to add mail server ssl certificate: Go to SSL → Mail Server SSL → issue ssl for mail.plasticocompostable.cl

8

Hi,

Did you setup mail.plasticocompostable.cl on CyberPanel? You should also add this subdmomain as rDNS record on your server (VPS/Dedicated server/Bare Metal server)

Yes, added A record for www.plasticocompostable.cl and www.mail.plasticocompostable.cl pointing to IP; and MX poiting to mail.plasticocompostable.cl

I have not configured reverse because I have 3 domains in the same panel and I am not sure if doing it with one of them could generate problems with other two,

Best regards,

9

HI,

You will need to add mail server ssl certificate: Go to SSL → Mail Server SSL → issue ssl for mail.plasticocompostable.cl

Yes, I did. I did it again now,

Best regards,

10

To create a mailserver with cyberpanel its simple:

  1. Say you have server at 123.456.789
  2. You have your primary domain at plasticocompostable.cl and another plasticocompostable.co.uk and another plasticocompostable.org

To setup your mailserver

  1. Install cyberpanel 01 - Installing CyberPanel - Docs - CyberPanel Community
  2. Add default nameservers as ns1.plasticocompostable.cl and ns2.plasticocompostable.cl . You can create these on your domain manager accessible to you by your domain provider How to use CyberPanel as DNS Only Server!
  3. Create a website by the domain plasticocompostable.cl make sure to tick the boxes for DKIM keys and mail 2 - Creating Website
  4. Go to ssl and issue ssl certificate for your mailserver
  5. Create an email address and setup spam detection/prevention Install SpamAssassin and Stop Email Spam on CyberPanel!
  6. Now create a website for plasticocompostable.co.uk and check the boxes for mail, ssl and DKIM keys

Now any email created e.g. [email protected] will use the mailserver mail.plasticocompostable.cl

Consult your provider about adding rDNS. Most providers have any easy to follow guide

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