Google Admin Toolbox
Domain name

error mercadobitcoin.com.br

There were some critical problems detected with this domain. Mail-flow is probably affected. Please refer to the corresponding help articles to fix these.
error
MX lookup must fit in one UDP response packet.
Overly large MX response will cause problems for many senders. To avoid this, either decrease the number of MX records or shorten their names.
info_outline
Effective SPF Address Ranges.
The following IP addresses are taken from the includes and IP4/IP6 directives within this domains SPF record.
mercadobitcoin.com.br.
23.21.109.197
23.21.109.212
147.160.167.0/26
_spf.google.com
_netblocks.google.com
35.190.247.0/24
64.233.160.0/19
66.102.0.0/20
66.249.80.0/20
72.14.192.0/18
74.125.0.0/16
108.177.8.0/21
173.194.0.0/16
209.85.128.0/17
216.58.192.0/19
216.239.32.0/19
_netblocks2.google.com
2001:4860:4000::/36
2404:6800:4000::/36
2607:f8b0:4000::/36
2800:3f0:4000::/36
2a00:1450:4000::/36
2c0f:fb50:4000::/36
_netblocks3.google.com
172.217.0.0/19
172.217.32.0/20
172.217.128.0/19
172.217.160.0/20
172.217.192.0/19
172.253.56.0/21
172.253.112.0/20
108.177.96.0/19
35.191.0.0/16
130.211.0.0/22
amazonses.com
199.255.192.0/22
199.127.232.0/22
54.240.0.0/18
69.169.224.0/20
23.249.208.0/20
23.251.224.0/19
76.223.176.0/20
54.240.64.0/19
54.240.96.0/19
mail.zendesk.com
103.151.192.0/23
185.12.80.0/22
188.172.128.0/20
192.161.144.0/20
216.198.0.0/18
spf.mandrillapp.com
198.2.128.0/24
198.2.132.0/22
198.2.136.0/23
198.2.145.0/24
198.2.186.0/23
205.201.131.128/25
205.201.134.128/25
205.201.136.0/23
205.201.139.0/24
198.2.177.0/24
198.2.178.0/23
198.2.180.0/24
_spf.psm.knowbe4.com
23.21.109.197
23.21.109.212
147.160.167.14
147.160.167.15
52.49.235.189
52.49.201.246
15.223.105.218
15.222.152.119
done
Domain should have at least 2 NS servers.
done
Naked domain must be an A record (not CNAME).
done
Every name server must reply with exactly the same TXT DKIM records.
done
Every name server must reply with exactly the same TXT DMARC records.
done
Every name server must reply with exactly the same CNAME records.
done
Every name server must reply with exactly the same NS records.
done
Every name server must reply with exactly the same MX records.
done
Every name server must reply with exactly the same TXT records.
done
DKIM authentication DNS setup.
done
Formatting of DMARC policies.
done
SPF must allow Google servers to send mail on behalf of your domain.
done
TXT lookup should fit in one UDP response packet.

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