Connection could not be established with host - Mautic 5 - Postal

Dear super team,

i install Mautic 5 and i am trying to connect to my postal server through my postal credential.
in email dsn Mautic configuration i got this error :
Using currently saved DSN: smtp://usrpostal:SECRET@postal.selectfunnel.com:25

Connection could not be established with host “postal.selectfunnel.com:25”: stream_socket_client(): Unable to connect to postal.selectfunnel.com:25 (Connection timed out)

i check my password in config.php is the same without any special characters but upper letter and lower letter.

i made an update of mautic in case you fix this issue, still the same issue.

could you please help on that.

many thanks