Hello,
"but when it goes to lotus inbox it is taking up to 50 characters"
1. Go to google
2. Type in sap workflow 50 characters
The first article found (for me) was this one:
How to have a Long mail title ?  (in ECC 5... | SCN
which linked to this one:
Remember that 50 byte limit on emails from workflow?
I hope it solves your problem.
regards
Rick Bakker