Haraka plugin for incoming email doesn't work when install with different domain and hostname

Hello, thanks for build this great mail server.

I already follow the instruction to setup the wildduck mail, and found a issues when I run the command below $ ./install.sh mydomain.com mail.mydomain.com if I define the mydomain.com same with mail.mydomain.com, the zone-mta for outbond SMTP and haraka for inbound SMTP work well without problem. but when I define the mydomain different with mail.mydomain.com, the zone-mta for outbund SMTP works well, but the haraka for inbound SMTP doesn’t work (proven by reply email from sender, that message couldn’t be delivered to [e-mail] because the remote server is misconfigured. see technical below for more information). do I miss some configuration ? please help me and thanks in advance

[andris9]

Sometimes VPS providers install Postfix to VPS servers by default. In your case make sure that the MX record is the following:

$ dig mx +short mydomain.com
10 mail.mydomain.com.

also make sure that when opening a tcp connection to port 25 of mail.mydomain.com then you get an answer from Haraka and not from Postfix.

[louis-lau]

As a mail server administrator you should be familiar with the various DNS records relating to email, and how they function: https://en.wikipedia.org/wiki/MX_record https://dmarcian.com/what-is-spf/ https://dmarcian.com/what-is-dkim/ https://dmarcian.com/start-dmarc/

does wildduck use postfix?

No. It uses Haraka for inbound email. Which is why this isn’t an issue with either wildduck or haraka, but probably an issue with your DNS records. You’re probably trying to send email to another mail server.