SPF records for SMTP service

Please help me to create SPF record that will be helpful to validate my outgoing mail. Here is my server environment.

We hosted an application at one hosting provider. Though he provided mail services, we are not using it. Instead we are using GoogleApps for official mail purpose. For this we already configured SPF record as "v=spf1 include:_spf.google.com ~all".

Along with this we have newly configured another SMTP server to use it for sending newsletters, promotional mails to our website visitors, as there are some limitations in usage of number of emails per day with GoogleApps.

We want to have both email services: GoogleApps and new SMTP server. In such cases, how can we create SPF record mentioning both IP addresses? Here is my new SMTP server IP: 45.23.77.65

Thanks in advance,

Max

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