With the ever increasing volume of SPAM being transmitted, many email services look toward more elaborate ways to authenticate email. Beyond the obvious – content – two commonly used methods (perhaps with some variations), include sender policy framework (SPF), and DomainKeys Identified Mail (DKIM). Both of these require the use of DNS records to function.… Continue reading DKIM/Domainkeys signing via DKIMproxy
Tag: email
Using Telnet with an SMTP Server
Despite having been around for a long time, telnet is an invaluable tool for testing a mail server. It allows one to pinpoint errors in the process – some which are not logged – and to quickly validate that things are working. Moreover, it enables one to get a better understanding of what their mail… Continue reading Using Telnet with an SMTP Server
Decoding a Base64 Email Attachment
I had a few files containing email attachments that needed to be converted into usable files. The following code (which has no checks in it), did the trick: <?php function decode_email_attachment(){ $data= file_get_contents($inputfile); file_put_contents($outputfile, base64_decode(str_replace( “\r\n”, “”, $data ))); } ?>
Basic Email Analysis
Despite ever increasing security, it appears that email accounts are breached more often now than ever before. Quite possibly this comes down to the user as opposed to the email service itself. The focus of this article includes distinguishing between spam sent from an unknown account and illegitimate emails sent from a known account; a… Continue reading Basic Email Analysis