When users enter values into an HTML form, the values that they enter are strings.
In many cases, the values you need are some other data types, like integers or dates.
Most SMTP server names are written in the form "smtp.domain.com" or "mail.domain.com": for example, a Gmail account will refer to smtp. The following C# source code shows how to send an email from a Gmail address using SMTP server.
It is usually used with one of two other protocols, POP3 or IMAP, that let the user save messages in a server mailbox and download them periodically from the server.
The networking or routing codes report status about the delivery system itself.
These system components include any necessary infrastructure such as directory and routing services.
This article discusses how to validate information you get from users — that is, to make sure that users enter valid information in HTML forms in an ASP. What you'll learn: If you ask users to enter information in a page — for example, into a form — it's important to make sure that the values that they enter are valid.
If this code accompanies a delivery failure report, sending in the future may be successful.
Network issues are assumed to be under the control of the destination or intermediate system administrator.
The mail delivery protocol status codes report failures involving the message delivery protocol.
Mail system status indicates that something having to do with the destination system has caused this DSN.
System issues are assumed to be under the general control of the destination system administrator.