For example, water is composed of two hydrogen atoms bonded to one oxygen atom: the chemical formula is H2O. A compound can be converted to a different chemical composition by interaction with a second chemical compound via a chemical reaction.
To send mail using an Outlook.com account from an email program, see the Outlook.com SMTP server settings. 1  Outlook.com SMTP server name smtp-mail.outlook.com. 2  Outlook.com SMTP port 587. 3  Outlook.com SMTP encryption method TLS.
Post Office Protocol Version 3 (POP3). One of the two protocols that receive email from SMTP servers. POP3 uses TCP port 110. Most email clients use this protocol, although some use IMAP4.