Local DNS records to work/test local mail server

[peracchi]

Hi! I'm configuring and testing a little Linux server with some Docker containers that I intend to deploy in a VPS.

Probably I done something wrong, can you guys help me to sort it out?

My "Custom filtering rules" is:

|arch-vps.mydomain.net^$dnsrewrite=NOERROR;A;10.22.22.33
|ldap.mydomain.net^$dnsrewrite=NOERROR;A;10.22.22.33
|mail.mydomain.net^$dnsrewrite=NOERROR;A;10.22.22.33
|portainer.mydomain.net^$dnsrewrite=NOERROR;A;10.22.22.33
|webmail.mydomain.net^$dnsrewrite=NOERROR;A;10.22.22.33
|mydomain.net^$dnsrewrite=NOERROR;A;10.22.22.33
|mydomain.net^$dnsrewrite=NOERROR;MX;15 mail.mydomain.net
|mydomain.net^$dnsrewrite=NOERROR;TXT;v=spf1 mx ~all
|_dmarc.mydomain.net^$dnsrewrite=NOERROR;TXT;v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=0; adkim=r; aspf=r; pct=100; rf=afrf; ri=86400; sp=quarantine
|2023-04-20._domainkey.mydomain.net^$dnsrewrite=NOERROR;TXT;v=DKIM1; h=sha256; k=rsa; p=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

When I issue a dig at my AdGuard Home I got:

[admin@arch-vps ~]$ dig @10.22.22.11 TXT 2023-04-20._domainkey.mydomain.net
;; communications error to 10.22.22.11#53: timed out
;; communications error to 10.22.22.11#53: timed out
;; communications error to 10.22.22.11#53: timed out

; <<>> DiG 9.18.13 <<>> @10.22.22.11 TXT 2023-04-20._domainkey.mydomain.net
; (1 server found)
;; global options: +cmd
;; no servers could be reached

🤔

[ainar-g]

If you look at the text logs of AdGuard Home, you'll see the error:

responding udp request: packing message: dns: string exceeded 255 bytes in txt

We currently only support one TXT string, and that TXT string must be no greater than 255 bytes.

[peracchi]

Thanks for the information!

I was so focused on solving another problem that I completely forgot to look at the AdGuard logs.

[parasiteoflife]

We currently only support one TXT string, and that TXT string must be no greater than 255 bytes.

Any plans to support bigger sizes? We can't use DKIM records