I am new to ZCampaign and am setting up the app.

I am asked to update the SPF record and DKIM signature from my DNS panel and it looked easy by following your suggestion from your help on-line: "add a record SPF..." .

Unfortunately Google Support (Italy) recommends not to add a new record but simply modify the existing one in order no to fall in some trouble .....  (here their page:  https://support.google.com/a/answer/4568483)

And now I am a bit confused; my question to you: 

1) what is the syntax I must use to add the second SPF text in same file (a comma? a semicolon? just blank space? .. other);

2) same question as above for the DKIM, must I paste-and-copy the second signature in the same file or create a new one?

thanks for your attention

ciao