MQL4 Reference Common Functions
General-purpose functions not included into any specialized group are listed here.
What's new in MQL5
In MQL5, the SendFTP, SendMail and SendNotification functions are moved to the new extended Network functions section. Now programs can exchange data with remote servers included in the list of allowed IP addresses. This means that MQL5 EAs are able to establish secure connections between processes using the TCP/IP protocol without using third-party DLLs.