An error when trying to add new transaction

[dhynadina1]

Hello, I tried to add a new transaction with an admin account, but I got an error 'Connection could not be established with host mailhog :stream_socket_client(): php_network_getaddresses: getaddrinfo failed: No such host is known.' Can you help me to fix it? thx

[meghakundu]

Hello, I tried to add a new transaction with an admin account, but I got an error 'Connection could not be established with host mailhog :stream_socket_client(): php_network_getaddresses: getaddrinfo failed: No such host is known.' Can you help me to fix it? thx

Same error till now!