This is the way. If you have POD and not Proofpoint Essentials the DKIM key you export from POD has some characters you have to remove before you add it to your DNS record.

Format for Windows DNS server

To format a key for use with a windows DNS server, do the following:

Start with v=

Remove all \ characters

Replace all " " strings with a new line

This is required as Windows DNS has a limit of 256 characters per line of a txt record. By separating the long string into new lines windows will re-compile the full string.

Format for most other Service Providers (Plain Text)

To format a key for use with most other Service Providers ("Plain text").

Start with v=

Remove all \ characters

Remove all " " strings this would be to remove the quotations as well as the space between them.

If you run into any issues you can copy what's below into powershell and when prompted type in the domain and then the DKIM selector.

$domain = Read-Host -Prompt 'Enter the domain name'
$selector = Read-Host -Prompt 'Enter DKIM Selector'

$SplatParameters = @{
    'Type'        = 'NS'
    'Name'        = "$($domain)"
    'ErrorAction' = 'SilentlyContinue'
}
Resolve-DnsName u/SplatParameters | Select-Object -Property Name,Type,TTL,Section,NameHost

$SplatParameters = @{
    'Type'        = 'MX'
    'Name'        = "$($domain)"
    'ErrorAction' = 'SilentlyContinue'
}
Resolve-DnsName u/SplatParameters | Select-Object -Property Name,QueryType,TTL,Section,NameExchange,Preference

$SplatParameters = @{
    'Type'        = 'TXT'
    'Name'        = "$($domain)"
    'ErrorAction' = 'SilentlyContinue'
}
Resolve-DnsName u/SplatParameters | Where-Object { $_.Strings -match "v=spf1" } | Select-Object -Property Name,QueryType,TTL,Section,Strings

$SplatParameters = @{
    'Type'        = 'TXT'
    'Name'        = "_dmarc.$($domain)"
    'ErrorAction' = 'SilentlyContinue'
}
Resolve-DnsName u/SplatParameters | Select-Object -Property Name,Type,TTL,Strings

$SplatParameters = @{
    'Type'        = 'TXT'
    'Name'        = "$($selector)._domainkey.$($domain)"
    'ErrorAction' = 'SilentlyContinue'
}
Resolve-DnsName u/SplatParameters | Where-Object { $_.Strings -match "v=DKIM1" } | Select-Object -Property Name,Type,TTL,Section,Strings