In the following, we have listed replies to the most frequently asked questions.
Since email is an asynchronous medium, we and all other providers cannot guarantee prompt delivery.
The spam filter systems comprise a number of different IP-based and content-based filter modules. Nevertheless, an email can be incorrectly identified as spam. Please send us the extended header for any email of this kind.
In case of unmistakable characteristics that indicate a spamming server, we delay any emails sent from a specific IP address, or reject them completely.
Additionally, check your server logfiles as of the first occurrence of any error.
Check whether you comply with the standards defined by the RFCs and please take note of our Email policy.