Telegram didn't accept long messages

[requiemofthesouls]

Describe the bug
Message bigger than 4096 length is not sending right now

To Reproduce
Steps to reproduce the behavior:

1. Send large mail
2. See error in bot logs

Expected behavior
Message received in telegram

Logs
{"level":"error","ts":1642851629.368856,"msg":"error send message","error":"Bad Request: message is too long"}

Additional context
How to fix: https://dev-qa.com/320717/sending-large-messages-telegram-bot

[requiemofthesouls]

Need to implement a service which renders html mails, cause send full html body isn't convenient right now.

[requiemofthesouls]

fixed