Hi @samadam,
Interesting question. Is there a reason why you're wanting to (or needing to) use an alternative? Assume the email body is getting parsed in a different format? I've worked with a number of different client, mail providers, languages etc etc and haven't come across this.
ServiceNow's response as you've pointed out is that, OOB (Out Of Box), that's whats supported and there is no way OOB to change the delimiter from a colon to another character.
However, if really needed, you'd have to script and handle this if it is a must. You'd have to be mindful of parsing issues with long email body's and potentially performance and security issue if you're going to handle this for yourself.
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Thanks, Robbie
