Split delivery with mailcow and microsoft outlook.

Selva

HI I have installed mailcow mail server as my own mail server.
I need to set up the split mail configuration with microsoft outlook.
Kindly provide the step by step process. Any one can help us.
Thanks.

DocFraggle

Maybe you should provide more detailed information on what you want to achieve! Mailcow is a mail server, Outlook is a mail client. What do you mean by “split delivery”?

Selva

for example I have configured the domain called abc.com in maicow mail server and and created the mailbox user is test.abc.com.

So the same domain abc.com is configured in the microsoft365 and there is have some mailbox users, If I send the mail from outlook to test.abc.com, the does not delivered.

So that I need to send the mail from outlook to the mailcow mail server with the same domain.

DocFraggle

https://docs.mailcow.email/third_party/exchange_onprem/third_party-exchange_onprem/ maybe

Selva

Thanks.

we need to know how to add the MX, A, and TXT records in cloudflare for the split mail configuration.

Kindly help us.

DocFraggle

Selva Sorry, no idea… isn’t there a Cloudflare forum for you to ask?

Selva

we have tried to send the mail from mailcow server to outlook.
But we facing the following error.

DocFraggle

Did you at least read the docs I posted above?

https://docs.mailcow.email/third_party/exchange_onprem/third_party-exchange_onprem/#set-up-the-mailcow

Set up the mailcow¶
Your mailcow needs to relay all mails to your personalized Exchange Host. It is the same host address we already looked up for the mx Record.

Add the domain to your mailcow
Add your personalized Exchange Host address as relayhost
Add your personalized Exchange Host address as forwarding host to unconditionally accepted all relayed mails from Exchange. (Admin > Configuration & Details > Configuration Dropdown > Forwarding Hosts)
Go to the domain settings and select the newly added host on the Sender-dependent transports dropdown. Enable relaying by ticking the Relay this domain, Relay all recipients and the Relay non-existing mailboxes only. checkboxes

Selva

Thanks it’s working fine,

Selva

Hi,

How to do the high availability in mailcow mail server?

esackbauer

Selva
Run it on a hypervisor which offers high availability. Currently there is no way of clustering it in a supported configuration.

Selva

Hi,

I installed and setup the Mailcow mail server. I also set up split delivery for my email server.
However, when I send an email from Mailcow, it ends up in the spam folder in the recipient’s mailbox.
How to resolve it?

esackbauer

How should we know? From which domain to which domain? We do not know your IP address, your domain, your DNS records.
Check your IP against blacklists and double check your DNS settings.
https://docs.mailcow.email/getstarted/prerequisite-dns/

Selva

Hi I have installed mailcow mail server in my own server, And I have configured the split delivery with outlook. All is working fine,

But now I am facing issue, that is If I send the mail to my outlook domain, my message goes in spam folder.

Another issue is If I send the mail to my personal mail like gmail.com, it is not send the mail to my mail account. It shows the following error.

The IP you’re using to send mail is not
authorized 550-5.7.1 to send email directly to our servers. Please use the
SMTP relay at 550-5.7.1 your service provider instead. For more
information, go to 550 5.7.1
https://support.google.com/mail/?p=NotAuthorizedError
l11-20020a17090ac58b00b002a2e545eac4si9940168pjt.87 - gsmtp (in reply to
end of DATA command)

Kindly help us to resolve the issue.

maddler

Spam categorization happens at the “local” level, you need to check why that happens on your Outlook server.
For the 5.7.1 is impossible to tell, but I’d guess you don’t have proper SPF/DKIM/DMARC configuration in place.
Make sure you followed all of the configuration steps, Google has a pretty strict policy on blocking incoming messages

Selva

Hi @maddler,

Thanks for the update. Can you give a example of which records we have to add in our mail server. Kindly share the details.

Because it will very helpful for us. Thanks.

maddler

That’s all in the Mailcow installation docs (which is in fairness among the best ones I’ve ever seen in ages), and/or a quick Google search will give the answer for just anything else. That’s all pretty much standard configuration you’re looking at.

Selva

Hi,

I have installed mailcow mail server and also configure the split delivery with outlook.

Everything is fine, But the issue I am not able to send the mail to gmail. I have checked all the records everything is goood,

Kindly help us.

esackbauer

Selva I have checked all the records everything is goood,

Just checking the records is not enough.
Have you checked the postfix logs, when sending a mail?

DocFraggle

Selva But the issue I am not able to send the mail to gmail.

Is it still this error?

The IP you’re using to send mail is not
authorized 550-5.7.1 to send email directly to our servers. Please use the
SMTP relay at 550-5.7.1 your service provider instead. For more
information, go to 550 5.7.1

If you are sending the mails from your private ISP IP address then you won’t be able to fix it, ISP pools are used by SPAMmers and therefore blocked by almost all mailservers. You have to use a relay service as the Google message indicated