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Table 1: tbl_send_email_queue

Table 2: tbl_send_email

Step 1: setup cron job which execute one file or in our case execute route each day's 1st minute.

Step 2: Hear you have to write script which get current date and compate it to admin defiend date if it's match then procced bellow steps.

Step 3: after user successfull registration, insert mail content and email id in tbl_send_email_queue table with send_email_flag=false.

Step 4: while procession step 1 script select all email from tbl_send_email_queue and move it to tbl_send_email and make send_email_flag=true

Stpe 5: now setup another cron job which execute one file or in our case execute route every 15 minute.

Step 6: for step 5 cron job script select 10 email from tbl_send_email table with send_email_flag=false, and execute mail script for that 10 emails.

10 email because of reduce server load.