smtp.pepipost.com :stream_socket_client():

Swift_TransportException: Connection could not be established with host smtp.pepipost.com :stream_socket_client(): php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in file /var/www/html/api.lifekaplan.in/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php on line 261

#0 [internal function]: Swift_Transport_StreamBuffer->{closure}()