hi, everyone, i come cross this issue. installed 4.20, test mail sending failed. contact form is not working. in system log, it shows:
System.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.Internals.SocketExceptionFactory+ExtendedSocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 18.104.22.168:25
any ideas? by the way, the web hosting is different from the email hosting.