I recently moved my transactional email sending to Mailgun It works good so far however I am wondering about the return-path header. Consider this email (I removed irrelevant header and replaced em...

My hosting provider recently suspended my website because something on it was sending out enormous amounts of spam email. Originally me and the provider thought that this was due to an unsecu...

TL;DR Mails sent from shared hosting (such as a cheap domain from Unoeuro or One.com) end up in spam. How to fix? Details I made a mail-system, that first generated a PDF-file (using FPDF), wherea...

I have a few forms on my site that have been getting hammered by SPAM bots lately. I've finally got it under control (without the use of a captcha). Basically, I'm checking the form for various fl...

I want to check the SpamAssassin SPAM score of E-Mails including headers generated by a script from a WebApp. Therefore I need to run this mail through SpamAssassin to get the specific SPAM ...

I try to send email from our server using php and Zend_Mail. I use smtp transport. This is confimation email of subscribing. But for some reason email that I send has strange headers and email goes...

Today we were discussing about email services in our team. My one team member informed us about Amazon Web Service they are using in their institute to send bulk emails. He said that AWS also give ...

I have a simple web application that provides daily financial data. Users subscribe, and we send them an email every day. However, Gmail is marking all of our emails as spam. What should we b...

I'm testing different captcha methods and i want to run some simulations / unit testing on the different methods. If there isn't a bot is there a service that will test the forms?

My website sends emails to users using the PHP mail function. Hotmail and Gmail users don't receive them, or they end up in SPAM-folder. Here is the header of a message marked as SPAM by Gmail. Wh...

My web application is sending transactional emails to its users (like "You received a payment", "Please activate your account", "Your article has been sold"). GMX users report regularly that those ...

We do a lot of mailing and we use Sendgrid to give it unique arguments and categories. But for storage, archiving, filtering and search capabilities, I would like to give them some other custom hea...

There are datasets with usual mail spam in the Internet, but I need datasets with fake reviews to conduct some research and I can't find any of them. Can anybody give me advices on where fake revi...

I'm using the phpmailer class to send emails. Currently gmail and yahoo do not mark emails as spam, but hotmail always does. How can I prevent this? My code is below. require_once('../PHPMailer/cl...

Had some spam issues on my server and, after finding out and removing some Perl and PHP scripts I'm down to checking what they really do, although I'm a senior PHP programmer I have little experien...

I received a spam message that had a .htm attachment. I opened the file in gedit on my linux machine and saw the following. Does the script it would try to run do anything? It looks harmless, yet c...

There are a lot of captchas plugins in Rails and also many types of solutions for preventing spamming and flooding. So it isn't only Rails question. Let's see what types of plugins do we hav...

I know that most spams are related with one or more links, so I am wondering if there is any web service which can check the spam-weight/spammyness of a URL. Similar to how Akismet can check the sp...

SPF is a powerful method to avoid blocking the emails as spam. However, setup of SPF is normally for the main domain, and I was unable to find setting for subdomain, and I am not sure if it is effe...

I'm using the following to send registration e-mails: $subject = 'subject is here'; $message_raw = 'e-mail text'; $message = base64_encode($message_raw); $headers = 'MIME-Version: 1.0' . "\r\n";...

Is there a way to check if a sent e-mail has been marked as spam or deleted? I work with Rails 3.

Technically this might not be classed as a programming question, since I have already implemented a solution. But it's an interesting issue in the tech field nonetheless. Anyway... I set up a...

A few days ago I upgraded Php Mailer and now some email providers my messages mark as spam. This is what I see in the headers of the marked messages: X-SpamTest-Info: {TO: header missing} ...

My site is getting larger and it's starting to attract a lot of spam through various channels. The site has a lot of different types of UGC (profiles, forums, blog comments, status updates, private...

I hope this question wont be too specific. But I really need to ask. We all know that we cannot fully prevent our emails to go to spam box right? But I guess we can decrease the #of emails that goe...