SPF record for multiple domains on one mail server ..

Hello :)

I have a domain, bla.xx, blo.xx, bli.xx and blu.xx ..  All domains have  A record mail.xx.xx. 
One domain has PTR record "mail.ble.xx". How will look SPF record for another domain ..? 

For domain ble.xx will look like: "v = mx spf1 the IP4: 111.222.333.444 include: spf.ble.xx -all" It is fine.

For domain bla.xx will look like: "v = mx spf1 the IP4: 111.222.333.444 include: spf.bla.xx -all"
or "v = mx spf1 the IP4: 111.222.333.444 include: spf.bla.xx include: mail.ble.xx -all" 
For domain blo.xx will look like: "v = mx spf1 the IP4: 111.222.333.444 include: spf.blo.xx -all"
or "v = mx spf1 the IP4: 111.222.333.444 include: spf.blo.xx include: mail.ble.xx -all"  
For domain bli.xx will look like: "v = mx spf1 the IP4: 111.222.333.444 include: spf.bli.xx -all"
or "v = mx spf1 the IP4: 111.222.333.444 include: spf.bli.xx include: mail.ble.xx -all"  
For domain blu.xx will look like: "v = mx spf1 the IP4: 111.222.333.444 include: spf.blu.xx -all"
or "v = mx spf1 the IP4: 111.222.333.444 include: spf.blu.xx include: mail.ble.xx -all"  

Exchange server has one public IP.

Thank you Michal. I'm sorry for my English.