SMTP issues using 1.1.1.1 (Cloudflare) as resolver

Remitur

Verified User
Joined
May 11, 2018
Messages
45
Hello.
I'm encountering various SMTP issues using 1.1.1.1 as resolver.
In /etc/resolv.conf I have

Code:
# Generated by NetworkManager
nameserver 1.1.1.1
nameserver 8.8.8.8
and this brings to very long SMTP delays (up to 25' to send a single message, both by webmail or external client)

Just changing it to


Code:
# Generated by NetworkManager
nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 1.1.1.1
everything works fine, and sending is almost immediate.

Anyone having the same issue with Cloudflare's DNS ?

Another question: everytime the server restart, /etc/resolv.conf switches back to its original default configuration, and I nee to edit it again... how can I change the default configuration ?
 
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