Bitexlive is a community paid Exchange listing.
You can send 500K or 1M in a single transaction, but test it with a single transaction and wait for confirmation. The fastest amount will be 500K QWC / TX.
I send on 25th June 1.000.000 transaction to Altex.Exchange and after 3 days still zero confirmations.
Here is the transaction details
To: Altex.Exchange (QWC1c1MxPtMeZteCVEWQ1XHnenHfNofaZB1V4kyqtz1qCgcoWaDajRG2zskVhGft9NL4mURhts9BFgb
Q9FP3CHQ97AHpTWtqBL)
Amount: -1,000,000.00
QWC Fee: 1.00
QWC Payment ID: E5A269A67D3192C1078DBD4F063AC9DF0B5D47FF3582C8D87F248E1BD9BF7E02
Transaction hash: 3229E1A0D3BFF453A8789232768A064303667BDA7319F6A3B64DD701FFCD953B
My wallet is syncronized and is fine, few minutes before 1.000.000 transaction i sent succesfully 10.000 QWC and 100.000 QWC to same exchange and transaction was ok, QWC arrived. So is not an wallet problem for sure.