| Re: testing email deliverability... [message #186060 is a reply to message #186037] |
Fri, 06 June 2014 12:11   |
Arno Welzel
Messages: 317
Registered: October 2011
Karma:
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Senior Member |
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Am 2014-06-05 02:48, schrieb The Natural Philosopher:
> I have web contact pages which are used by anyone to send enquiries.
>
> I want to make sure that anyone using them has a valid reply address set
> in a web form BEFORE I forward the message on to the site administrators.
Without asking the MX you will never know, if the MX is willing to
accept the mail.
And even then - temporary 4xx-failures due to Greylisting are a valid
behaviour as well as failures due to a quota limitation etc. - which all
does *not* mean that the e-mail address is invalid. Unfortunately the
opposite behaviour - accepting a RCPT TO without any error in return -
must not be interpreted as "this is a valid address".
Therefore the usual way to handle this is to send an e-email with a
confirmation request so the user can approve that himself - combined
with a database table to store the pending approvals (which should
timeout after a certain time if no one approves the request - e.g. after
7 days).
--
Arno Welzel
http://arnowelzel.de
http://de-rec-fahrrad.de
http://fahrradzukunft.de
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