I am using SMTP for mail service. Is there any limit for maximum that mail can be sent for a month or day? If limit is der then how much i can send? Please reply me soon.
SMTP do not limit email delivery. However your ISP or hosting provider limit your email delivery. Check your ISP or hosting provider. For example in your server hosted in Godaddy, then Godaddy restrict email delivery per day, For extra email delivery you need to purchase additional relay mail service from godaddy
Thanks
Your MTA (mail server) can and most probably does limit. For example smartermail has some defaults on messages per day and per hour that are per mailbox that can be set, Im sure MailEnable and all the other ones do as well.