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Sometimes new order emails are not being received by us and our customers are not receiving their new order email confirmations. When I try to resend an email in Woocommerce, sometimes the email is sent but a 504 timeout error is produced with the error logged below:
2021-08-08 22:55:48 UTC [apache][:warn] [pid 56678] [client 71.64.XXX.XXX:54300] Timeout waiting for output from CGI script /home/u888-hjcegfgoeccz/www/domain.com/public_html/wp-admin/post.php, referer: https://domain.com/wp-admin/post.php?post=11003&action=edit
WP Mail SMTP Version: 3.0.2
Woocommerce Version: 5.5.2