email-validation

问题 This question already has answers here : Closed 9 years ago . Possible Duplicate: What characters are allowed in email address? I have an email address with an apostrophe in it and am wondering if that is valid? 回答1: Yes, according to RFC 3696 apostrophes are valid as long as they come before the @ symbol. 来源： https://stackoverflow.com/questions/8527180/can-there-be-an-apostrophe-in-an-email-address

问题 I created a form in which you have to insert an email address. I already have a validation method. But i need to make sure that the email actually exists. Is it possible? 回答1: In the general case it is not possible without user interaction. A few things you can do to validate an email address: Regular expression You can use a regex to validate the email address format . It does not guarantee that the address exists, but at least your user input will be well formed. Validating email addresses

问题 This question already has answers here : How to validate an email address using a regular expression? (74 answers) How to check for valid email address? [duplicate] (18 answers) Closed last year . I want to find valid email addresses in a text file, and this is my code: email = re.findall(r'[a-zA-Z\.-]+@[\w\.-]+',line) But my code obviously does not contain email addresses where there are numbers before @ sign. And my code could not handle email addresses that do not have valid ending. So

问题 This question already has answers here : How to validate an email address using a regular expression? (74 answers) How to check for valid email address? [duplicate] (18 answers) Closed last year . I want to find valid email addresses in a text file, and this is my code: email = re.findall(r'[a-zA-Z\.-]+@[\w\.-]+',line) But my code obviously does not contain email addresses where there are numbers before @ sign. And my code could not handle email addresses that do not have valid ending. So

问题 This question already has answers here : How to validate an email address using a regular expression? (74 answers) How to check for valid email address? [duplicate] (18 answers) Closed last year . I want to find valid email addresses in a text file, and this is my code: email = re.findall(r'[a-zA-Z\.-]+@[\w\.-]+',line) But my code obviously does not contain email addresses where there are numbers before @ sign. And my code could not handle email addresses that do not have valid ending. So

问题 My software is working with incoming e-mail from the one and only particular sender (let it be SantaClaus@hetnet.nl). According to RFC-2616 section 14 "From" header MAY be used for logging purposes and as a means for identifying the source of invalid or unwanted requests. That's exactly what I needed, so I wrote a code, which ignores all the messages where "From" field doesn't equal SantaClaus@hetnet.nl . It worked good, but one day things changed, and now all the messages form Santa Claus

问题 My software is working with incoming e-mail from the one and only particular sender (let it be SantaClaus@hetnet.nl). According to RFC-2616 section 14 "From" header MAY be used for logging purposes and as a means for identifying the source of invalid or unwanted requests. That's exactly what I needed, so I wrote a code, which ignores all the messages where "From" field doesn't equal SantaClaus@hetnet.nl . It worked good, but one day things changed, and now all the messages form Santa Claus

问题 I Have a problem with a prepared statement in C#: OdbcCommand cmd = sql.CreateCommand(); cmd.CommandText = "SELECT UNIQUE_ID FROM userdetails WHERE USER_ID = ?"; cmd.Parameters.Add("@USER_ID", OdbcType.VarChar, 250).Value = email; (of course email contains a valid email address, with @ sign). This code returns a random error - "The connection has been disabled" {"ERROR [01000] [Microsoft][ODBC SQL Server Driver][TCP/IP Sockets]ConnectionWrite (send()). ERROR [08S01] [Microsoft][ODBC SQL

问题 I Have a problem with a prepared statement in C#: OdbcCommand cmd = sql.CreateCommand(); cmd.CommandText = "SELECT UNIQUE_ID FROM userdetails WHERE USER_ID = ?"; cmd.Parameters.Add("@USER_ID", OdbcType.VarChar, 250).Value = email; (of course email contains a valid email address, with @ sign). This code returns a random error - "The connection has been disabled" {"ERROR [01000] [Microsoft][ODBC SQL Server Driver][TCP/IP Sockets]ConnectionWrite (send()). ERROR [08S01] [Microsoft][ODBC SQL

问题 I would like to enable my website form to check if the email inserted by my visitor is valid and exist before allowing them submit the web form. I do understand there is many Javascript to check the email pattern validation. But I need something such as SMTP Email Checking or Validating. The email inserted by visitor must be valid format and also existed, this is to prevent visitor inserts invalid email, incorrect email address, as well as spamming email address. Please kindly provide a