Ignore spam level dependent mail
If the current rating of a message reaches or exceeds the spam level of this option, the email is discarded, i.e. it does not reach the corresponding recipient.
The permissible - albeit not always reasonable - value range is from 0 to 100. Below 5 is not reasonable because there is too great a risk that normal emails will be discarded as spam. More than 20 then only applies to spam with an extreme spam level, such as emails that have been classified as phishing emails.
If this value is not to be effective or inactive, the content of the field in the form must be deleted (do not enter an artificially high value)!
Attention: The values 0 and such >= 100 have a special meaning and cause that the messages going from outside the TU to the address are always rejected or blocked.
This option becomes effective as soon as the spam level of an email reaches or exceeds "Ignore SPAM level". The message is effectively suppressed or discarded from the point of view of the specific recipient, but without the recipient learning about it. This means that a sender would assume that the mail was transmitted correctly. An exception, however, is the case where the SPAM level of an email reaches or exceeds the "Ignore SPAM level" of all recipients (in the case of individual recipients, of course, this is always the case). Then a permanent error is reported back to the sending mail server (and can also be reported technically) in favor of clean communication, e.g.
550 5.7.1 Spam blocked: score 18.9 >= 8.0 matching tests (BAYES_50,HTML_EXTRA_CLOSE,HTML_IMAGE_ONLY_16,HTML_MESSAGE,HTML_SHORT_LINK_IMG_2,MIME_HTML_ONLY,NO_REAL_NAME,RAZOR2_CF_RANGE_51_100,RAZOR2_CF_RANGE_E4_51_100,RAZOR2_CF_RANGE_E8_51_100,RAZOR2_CHECK,RCVD_IN_BL_SPAMCOP_NET,RCVD_IN_ISPAWL,RCVD_IN_NIXSPAM,URIBL_AB_SURBL,URIBL_BLACK,URIBL_JP_SURBL),http://www.zid.tuwien.ac.at/kom/services/mail/bounced_spam/, opens an external URL in a new window
550 5.7.1 Spam blocked: score 18.9 >= 8.0, http://www.zid.tuwien.ac.at/kom/services/mail/bounced_spam/, opens an external URL in a new window
This permanent error is usually sent back in this form as part of a bounce mail (as a non-delivery report, NDR) to the sender - if it exists.
This is a so-called strict option, which is always effective (i.e. either "ignoring" or "blocking").
If this value is set, but does not block spam levels, then the present value of this option implicitly applies to block spam levels at the same time!
The decision about the action for a message is recorded by logging in the email system.
With the special value for "Ignore spam level" of 0 (zero) a basic suppression can be forced. In particular, this also applies to emails with a spam level of < 0! In this case, the sender will also be informed of this circumstance with another error message (whereby the actually determined spam level is informally listed as a score):
550 5.7.1 Access denied - for internal use only (score -0.2 ignored)
This can be used for all email addresses (including generic addresses since December 2008):
- all generic forms (@tuwien.ac.at, @student.tuwien.ac.at, @alumni.tuwien.ac.at)
- function and distribution addresses created via TISS address book (@tuwien.ac.at)
- Other recipient addresses arriving via the mail bastion *@*.tuwien.ac.at
- Foreign domain addresses that explicitly lead to a TU Wien mail server via the mail bastion.
With a value >= 100, a further effect is achieved with generic addresses, in which the SPAM ignore level of the specified value minus 100 is also effective in the TU-internal case. However, this only affects messages that actually resolve via internal email mail routing. This means that messages are not created via upTUdate-to-upTUdate or originate from various TU-internal mass mailings. I.e. with a value of 110, a spam level >= 10.0 leads to a rejection of the message even with TU-internal spam sources.
Note: If you want to explicitly block special forms of the many generic address forms, you can list the concrete address form in the email Options form in the section "for TU delivery addresses" and provide it with the desired, individual values, e.g. ignore spam level = 0 as above, and thus no longer let external emails through.
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