Email Marketing Software Market Size, Share & Industry Analysis, By Channel (B2B and B2C), By Deployment (Cloud-based and On-premise), By Enterprise Size (SMEs and Large Enterprises), By Application (Email Lead Generation, Sales Reporting, Customer Management, Template Management, Reporting and Analytics, and Others), By Industry (Banking, Finance, Security, and Insurance (BFSI), IT & Telecommunication, Retail, Information Technology-enabled Service (ITeS), Healthcare, Consumer Goods, Travel and Transportation, and Others), and Regional Forecast, 2026-2034