We are getting following error when we try to test an send email functionality in wordpress with sendgrid.
Versions: WordPress: 5.2.2 WordPress MS: No PHP: 7.2.24-0ubuntu0.18.04.2 WP Mail SMTP: 1.6.2
Params: Mailer: sendgrid Constants: No Api Key: Yes
Debug: cURL error 18: transfer closed with 116 bytes remaining to read