Haseeb --

...and then Haseeb Iqbal said...
% 
% thanx to all those who replied to my previous question.

Happy to help!


% 1 more question.i need help with reqular expressions.i want to check valid
% (email)
% usernanes for my mail server .i.e. Qmail. any help welcome.

It's come up before, so the first place to look is the archives.  It's
pretty easy to check for a legally formatted mail address; it's a bit
trickier to check for a valid right hand side; it's impossible to check
for a valid left hand side unless it's your own machine.

Basically, and from the top of my head, an email address is

  a letter or number
  any number of letters, numbers, underscores, dashes, plusses, periods
  an @
  either
    a letter
    any number of letters and numbers, perhaps separated by periods
    a period
    a TLD (currently 2, 3, or 4 letters)
  or
    an IP address

and so it gets a little hairy to write but it can be done.

You might also do a quick google search for something like

  email address regular expression check

to see if someone has worked out a good and complete one.


% thanx in advance
% Haseeb


HTH & HAND

:-D
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