Zabbix monitoring system - parse email

Zabbix monitoring system - parse email

We're using SDP 8214 ver + zabbix monitoring server
By now, we're trying to connect zabbix and SDP together, and run into a problem:
We've understand the posibilities of email parcing, but can't understand how-to auto-close requests if zabbix messages that everything is fine.
Ex:
ping server rule
if echo didn't received in a 1 minute scan, email message to SDP
SDP opens request
after some minutes, server is UP and zabbix message to SDP that it's UP
but it won't close a request, because zabbix didn't know the request id. As I know, zabbix can't parse email from SDP and write SDP request id.
So, can we use zabbix event id+90000 (so id in SDP will start from 90001 90002 90003...), as I understand we can use  Operation = AddReques + requestid=zabbix_id+90000 ?
By now, SDP id is 2000, will it be continue to count from 2000 or after first request 90001 is created it'll be continue to count from 90001?

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