The code 554 5.7.1

rumij

Today,my mailcow cannot income any mail-server. I check somethings, but prt is not ok. What I should do ?

ETNyx

Hello,… well PTR is usually set by your provider (hosting, ISP,…) ask him to fix this, or if you have some UI to make this by yourself?

Also I would suggest to review all of your DNS records. You are lacking AAAA (IPv6) records, although it could be intentional, in SPF you are referencing unresolvable record, also not deal break but i like to keep mine record tight.

rumij

ETNyx thank you. I donnot know how to wirte SPF value。what I should write it? Then I can income mail by anthor the use the mailcow .

ETNyx

rumij Your primary problem to solve is PTR !

About SPF, if you want to run own mail server, please educate yourself. Basically what @mlcwuser wrote, but if you do not know what you are doing than c&p is wrong solution here. From what you wrote, seems you need to educate self.

mlcwuser

Regarding the SPF record, the easiest method, for a single mail server that handles everything on one server with a single IP is:

v=spf1 mx -all

v=spf1 mx ~all

This allows the domain’s mx (the server the MX record points to), to send email for the domain and prohibit all others. Of course you could be more explicit, but that won’t gain much, in a single-server scenario, if the MX record already points to the correct server.

See here for a very detailed breakdown of SPF records.

And here for more details about the difference between hard fail - and soft fail ~