mail issues in magento2.2.4

[shweta_singh1]

i am using magento 2.2.4. when customer  register and make an order from my site then confirmation mail is not sending to customers but its working properly for admin.admin is able to receive order mails.how do i remove this error

[Tarandeep Singh]

@shweta_singh1Make sure your cron is running.

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