[otrs] genericagent can not search by subject or from email id with decimal

hi, in otrs 2.4.6 (running on linux), i am unable to get genericagent batch jobs execute when setting them to search on: * subject: You have a new Voicemail i have tried the above text without double quotes, with them and even with single quotes but each time it results in 0 matching mails while they do exist in the new, open status in the queue i am specifying * from (email): someone@abc.xyz.com the above email id also doesn't seem to be executing. btw, i am using the gui to configure them and executing a lot of genericagents every 30 mins. as we receive several thousand emails daily. can someone please assist? regards, saurabh pande.