Execute command through SSH

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http://unix.stackexchange.com – I am writing a script to check whether all the servers in my organization are functioning properly. One of those is Zimbra mail server. I am trying to send a mail through sendmail provided by zimbra package using the following command ssh Jarvice@someip echo "Hello" | /opt/zimbra/postfix- [email protected] But I am unable to do so. I think I am making some mistake in the echo "Hello" | /opt/zimbra/postfix- [email protected] part. But I don't know what it is. Can someone tell me the correct way to do so? Since I am doing this through a script (HowTos)