Each messaging channel connected to SleekFlow comes with its own rules, capabilities, and limitations. This includes what types of messages you can send — such as text, media, or files — as well as how long you’re allowed to message a customer after they last replied.

This article will help you understand the difference between supported and unsupported message types, and how to troubleshoot common limitations.

Supported message types vary by channel

Different channels (e.g. WhatsApp, Messenger, Instagram, LINE) have different rules on what message types are allowed. These rules are set by the platform (e.g. Meta, LINE) and affect:

• Message window duration: For example: WhatsApp’s 24-hour customer reply window
• Supported formats: such as text, image, video, PDF, quick reply buttons, and more
• File size limits: each platform has different limits for files, images, and video
• Unsupported or restricted content: some channels are not supportting certain features like carousels, audio messages, or buttons

To view supported formats, max sizes, and other rules for each platform, visit the channel-specific articles below:

• WhatsApp Business API:
  • Supported message types
  • Unsupported message types
• Facebook Messenger
• Instagram
• LINE Business
• Telegram
• WeChat
• Viber
• SMS