i'm glad you found an IRC client you are happy with that resolved the problem you were having. But please keep in mind that if this problem were totally due to mIRC and had no relation to anything else, it would be happening to everyone all the time. It isnt and doesnt, which tells me the issue is more complex than simply blaming one piece of software.

There are also numerous problems than can cause 10053, this thread focuses on suggestions when it consistently happens to some users only while dccing and doesnt address other common causes for that error

ParaBrat @#mIRCAide DALnet