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Shital Bhalerao 6Shital Bhalerao 6 

System should be able to trigger emails via Sendgrid as a commmunication to the customer,how should write trigger or any other solution please suggest write a trigger ,when ever new contact is created they will get the autoresponse mail for welcome

AnkaiahAnkaiah (Salesforce Developers) 
Hi Shital,

Refer the below link have solution for similar kind of ask.
https://salesforceforfresher.wordpress.com/2021/07/08/sending-email-from-apex-trigger/

Thanks!!