There is a huge advancement in the field of technology in modern era. Every work is computerised and nobody can think himself without computer. Computers have various websites to help people to communicate with the other person, to attain the information regarding the job vacancy and to apply for the same and many more are there. Smtp server port is a kind of Internet Standard for mailing. Smtp are the short form of SMTP protocol. Smtp helps in sending and receiving up of the mail and the messages. Smtp is used by client mail applications. The starting up of electronic messaging was in the form of one- to- one in 1960s. Specific mainframe computers were in much use.

A port is an endpoint to the rational connection in UDP networks. Some ports have numbers which are pre- assigned to them. The range of port number varies from 0 to more than 60000 but some are reserved for some specific privileged services. The port number is specified along with the description. The simple message transfer protocol connects the people worldwide.

There are a lot many of options available for the users. Gmail is awarded for a robust free service. There is great demand for gmail account among the users. It is compulsory for a person to have a gmail account ID to use the site. The settings can be entered into any mail client if one possesses the account setup.If a person has to check that the smtp server is working or not then he can do that by changing the smtp port to 587 and also it sends a text message to one's gmail account. Gmail accepts e- mail from there.

Among many websites online, yahoo is an e-mail programme on the web and it has the capacity of storing unlimited data on mobile devices. There are so many social networking sites for yahoo where these are operating. It provides the facility of instant messaging. It is free –form labelling and provides you a joyful experience. Spam in yahoo has the function of filtering junk mails. Yahoo mail integrates email, text messaging. It comes with ample amount of storage facility.

Several kinds of junk mail fill the spam and then there comes the need to avoid this increase in spam. For this port 25 is there. But then also net abusers can hijack the virus infected PCs. smtp server port 25 is a kind of healer for the computers and required for the security purpose.