Not possible with Eggdrop, since it has its own internal message queuing/anti-flood mechanism. The only way to disable it for the Eggdrop 1.6x series is by removing the related code from
src/mod/server.mod/server.c.
And before you ask, there is no configuration option to disable it. There was a discussion about on Eggdrop's mailing list a while ago, I'll try and find the post.
Edit: Found the links.
Original thread:
http://www.eggheads.org/pipermail/eg...ly/011923.html
Eggdrop developer's reply:
http://www.eggheads.org/pipermail/eg...ly/011929.html
Hack/workaround:
http://www.eggheads.org/pipermail/eg...ly/011930.html