For several years now, German ISPs and webmails have been tightening their policies towards the advertisers targeting German recipients. Recently, you might have noticed that German ISPs have rejected part of your email stream pointing out a generic PTR as the reason of rejection. In order to improve your chances to deliver communications to German… Read More »
When targeting Office365 hosted mailboxes, Microsoft assigns a Bulk Complaint Level to incoming messages originating from bulk mailers.The BCL rating is being assigned the same way the Spam Confidence Level (SCL) through an appended X-header. A high BCL level indicates the related message is likely to be spam.To determine the BCL level, Microsoft uses both… Read More »
A lot of marketers thinks that having their account setup on shared IP infrastructure at their ESP (Email Service Provider) would actually boost their chances to get to their recipients inbox. The reality is much more complicated, a shared IP pool hosting tens or even hundreds of clients is subject to variation in terms of… Read More »
Across the last couple of months I have seen more and more marketers asking for the possibility to send out their communications through a secured end-to-end encrypted connection. A while ago, Gmail started to promote TLS (Transport Layer Security) encryption for marketers sending communications towards individuals using their services. While, the fact of not sending… Read More »
You might have been experiencing delivery issues to “laposte.net” recipients, as of the beginning of the month, Laposte.net has been experiencing severe issues generating delays in the reception of incoming emails. A large part of emails aimed at @laposte.net users are currently being rejected with the following SMTP response: 421 4.3.2 All server ports are busy… Read More »
Starting Friday 24th November this year, it appears that Microsoft had been experiencing issues in relation with one of the most important day of the year in terms of sales for retailers. It seems that Microsoft infrastructure has been struggling to cope with the high inbound traffic which was being received from retailers on Black… Read More »
Every time a message is received at Microsoft side, it is going through their spam filtering system which gives it a spam score. The related spam score will then be assigned an individual Spam Confidence Level (SCL) rating which is then included as an X-header to the related email header. Microsoft automated systems will then… Read More »
Microsoft has recently revealed that it now uses Certified Senders Alliance (CSA) to get more information when they need additional data regarding a questionable sender which generated complaints from their users but not enough to be categorized as bad. Here are the cases where Microsoft uses CSA data: a) We regularly see spam complaints from… Read More »