or if it is not supported by your ISP just submmit a ticket to apply it.PTR or reverse DNS or rDNS tell the domain name of your IP, you may set this record in your VPS console like this or if it is not supported by your ISP just submmit a ticket to apply it.
| type | record | value | ttl |
|---|---|---|---|
| A | @ | 130.255.76.237 | 600 |
| A | 130.255.76.237 | 600 | |
| A | www | 130.255.76.237 | 600 |
| cname | smtp | 130.255.76.237 | 600 |
| cname | pop | 130.255.76.237 | 600 |
| cname | imap | 130.255.76.237 | 600 |
| mx | @ | mail.dba.pw | 600 |
| text | @ | “v=spf1 mx ~all” | 600 |
| text | _dmarc.dba.pw | “v=DMARC1; p=none; rua=mailto:dmarc-reports@dba.pw” | 600 |
| text | s20190305648._domainkey.dba.pw | “xxxx” | 600 |
docker run \
-p 25:25 \
-p 80:80 \
-p 110:110 \
-p 143:143 \
-p 443:443 \
-p 587:587 \
-p 993:993 \
-p 995:995 \
-v /etc/localtime:/etc/localtime:ro \
-v /var/maildata:/data \
--name "mail" \
-h "mail.dba.pw" \
-t analogic/poste.ioLoin to admin panel via like https://mail.dba.pw go to like https://mail.dba.pw/admin/le/ 
https://mail.dba.pw/webmail 
https://mail.dba.pw/admin/login 
Note: Use POP protocol will keep all mails in local machine and delete from server side. server: pop.dba.pw:110 username: line@dba.pw connection security: starttls 
## imap server: imap.dba.pw:143 username: line@dba.pw 
## smtp serve: smtp.dba.pw:587 username: line@dba.pw connection security: startttls 
refer1: https://qing.su/article/139.html refer2: https://poste.io/doc/client-settings