Who is allowed to send mail as you
v=spf1 a mx include:_u.lattice.com._spf.smart.ondmarc.com include:mailgun.org ~all
Your SPF record doesn't authorize Google to send mail. Even though FrostSender connects via Gmail, your SPF check will fail — recipients will treat your mail as suspicious.
Cryptographic signature on every send
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApqjXkDJ4ViJmOs8H8MS4lbtTqUIIm144pvR8aPlkvMyXZ7HAQq7t0Ka0466ajrl9osOwBI8PiizCuy+FXppNK+2juF+mxq6fW9g96vYCHahDxatuplDO2rhwFFHoMYkfgRiSGjwNtoJbxtgOxZIQ1LKzlGJquMvFMecjbXfntQ7QO9dsJWTLCsXPMr41jBfrI37HY32M/+YjqFQjYLTaBoOoak47DO+BeEoHys7ldHI9XR0/5g1DV2BhLLcTwYkRB15KGYE5PPp8KoDbDayEi80KRCJBklFtTgpVWa8miErbTXTmrqQfJeeXHZBLHtfGIi43MwTKGYYr7vuRX2wQYwIDAQAB
What receivers do when SPF or DKIM fail
v=DMARC1; p=reject; pct=100; fo=1; ri=3600; rua=mailto:31a91356@inbox.ondmarc.com; ruf=mailto:31a91356@inbox.ondmarc.com;
Where your inbound mail is delivered
aspmx.l.google.com, alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com
Want this fixed at the source?
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