Outlook schedule email unless reply

[cascom]

I have a case where I would like to schedule emails only for those emails that are sent to customers without it being a reply to them, i.e. delay only to delay emails that are not a reply to an incoming mail, but those that are sent out unsolicited.

In other words, if an email is a forward or a reply, this should go out immediately.

[#2]

https://support.microsoft.com/en-us/office/delay-or-schedule-sending-email-messages-026af69f-c287-49.... This is the best option for the moment, but it only allows for 120 minutes delay. Can this not be delayed longer?