Question : I am using Horde mail, I attach one file with 12MB, but it prompt me the bellow message.
Solution : Due to the Horde mail got a limit here (Maximum Attachment Size: 2,097,152 bytes), we suggest you using the outlook or other email client to sending attachment file more than 2 MB or you may use google (gmail) and yahoo.com to send or receive you website mail.
Use Gmail to send and received mail your company emails
Gmail Setting Help
Using a custom ‘From:’ address to send
About Mail Fetcher
Use Yahoo Mail to send and received mail your company emails