Domains with DNS TXT v=spf1 ip4:135.181.144.251 include:_spf.protonmail.ch include:relay.mailchannels.net mx ~all
There is 1 domain that have DNS TXT set to v=spf1 ip4:135.181.144.251 include:_spf.protonmail.ch include:relay.mailchannels.net mx ~all.