Sub Macro not working with main Macro

I am trying to run sub macro after the main macro has executed but it is not running , this macro is regarding mail sending from excel to lotus notes but at a time only one mail is going , i wanted all the email within that column one by one should get executed , kindly let me know what i have to change as i am new to VBA

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Can anyone help me out as i have to sent around 500 emails through excel