I'm using Azure Queue to send emails. But for last time I'm getting exception about queue size limit up to 65536 bytes even after cheking the message size.
While it is true that the maximum size of a message can be 64KB however Azure uses UTF16 encoding to store the data thus for each byte of data that you provide, Azure Storage uses 2 bytes to store that data.
What this means is that you can essentially store up to 32KB of data in a message in an Azure Queue. Because you're exceeding this 32KB limit, you're getting this error.