Capture Bounced Email Addresses via PHP

Question

I am currently working on a project which processes an array of data which is imported from a csv. Once the data has been processed for that specific row, it will send an email to the email address specified for that row.

My client has a requirement that they need to know if an email bounces due to an incorrect email address being entered to the csv.

I currently send the emails by using PHP and an SMTP relay which we host, The only way that i have found to work so far is to scan the sending email address for any emails which contains the subject Undelivered Mail Returned to Sender.

This is working perfectly and i am getting a list of all of the emails which have bounced. My problem is that i need to get the email address which was entered incorrectly. If you see the screenshot below you can see that the script generates an HTML element/node which contains the email address.

My question is, How to i grab/call this element?

I have tried print_ring the email object, unfortunately there is no array index with the email address which i require.

Please see my code below to see how i have gotten this far:

<?php $date = date('y-m-d'); $hostname = ''; $username = ''; $password = ''; $inbox = imap_open($hostname,$username,$password) or die('Cannot connect to mailbox: ' . imap_last_error()); $emails = imap_search($inbox,'SUBJECT "Undelivered Mail Returned to Sender" ON "'.$date.'"'); if($emails){ rsort($emails); foreach($emails as $email){ $overview = imap_fetch_overview($inbox,$email,0); $message = imap_body($inbox, $email); print_r($overview); print_r($message); echo '<br>'; print_r($email); } }

Thanks for your excellent help and support over the past.

Lewis

Do you have any code examples? The address has to be in there somewhere.. — Kyrre
– Kyrre, Commented Sep 26, 2017 at 13:50
Added the code on how i am grabbing the emails, The only place the email address is specified is in the html node which i referred to earlier. Thanks — Lewis Browne
– Lewis Browne, Commented Sep 26, 2017 at 13:55
I've never used imap_search(), but I see you are using the SUBJECT and ON keywords.. according to php.net/manual/en/function.imap-search.php, there is a TO keyword. Maybe you can do some magic with the query, some wildcarding maybe? Sorry if I'm pestering and not helping, but what does $emails contain? — Kyrre
– Kyrre, Commented Sep 26, 2017 at 14:02
No problem man, ill see if i can pull some wizardry on it! The $emails is an array of all of the emails which were returned by the .imap_search $email contains basic information such as, sent_date, sent_to and sent_from. Before you say sent_to sounds like what you are asking for. No, the email address specified here is the email address which contains all of the bounced emails. I appreciate your help! — Lewis Browne
– Lewis Browne, Commented Sep 26, 2017 at 14:08

Lewis Browne · Accepted Answer · 2017-09-26 14:37:58Z

David and Kyrre managed to point me in the right direction, after a little more research i was able find that the email address is also located as being a Final-Recipient after a little research on how to grab the Final-Recipient i was able to grab what i needed.

To do this i did the following as discussed on this SA thread: Regular expression to parse Final-Recipient email header

 $message = imap_body($inbox, $email); $pattern = '/Final-Recipient: rfc822; (.*)/'; $matches = Array(); preg_match($pattern, $message, $matches); $email = $matches[1];

David J Eddy · Accepted Answer · 2017-09-26 14:12:36Z

As @Kyrre mentioned the imap_search() string, pretend it is a SQL query. Getting bounced email was answered here. There is also this sweet walk through that returns the entire email message content.

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