 Some common mistakes that happen in the creation of an SPF record One common mistake is having more than 10 DNS lookups. It's very important to keep our total number of DNS lookups And that would include the includes and it would include things like The a record and MX record if we're including things like that, but wouldn't include If we're specifying just IP addresses Or IP ranges that wouldn't affect DNS lookups You need to keep the record length to less than 255 characters. It's just a good rule to do that You can only have one SPF record. It's very important It's usually a bad idea to have unnecessary sources in your SPF record So for example if you're not actually sending email from your web server, then you wouldn't want to add a And if you're not using your incoming mail servers for sending email, then you wouldn't want to use MX One common mistake is having incorrect sources. So for example having an include that No longer exists. So we have an include that performs a DNS lookup to a location on the internet that that doesn't exist That's a common mistake or redundant sources. So having things like maybe an include and a an IP address listed that That point to the same server for example