Email

Since last Friday (May 8) around 18:30, our SMTP servers have intermittently refused to accept mail for sending. The issue was caused by rspamd refusing to filter messages for unknown reasons. The issue seems to be resolved for now, we will keep an eye out for the problem to re-occur. Update: It looks like the issue was resolved by explicitly setting some default settings to their default value. By doing this we were able to prevent errors that occurred with some e-mails. We think these errors caused the SMTP server stop accepting mail in some cases.

FNWI users have been experiencing delays in email reception since early this morning. We have been working on this issue but have not solved it yet. No emails have been lost, but we suspect certificate issues between the Science mail servers and the central RU mail filter. Update: the exact cause remains unknown. During investigations together with RU-ILS, we noticed a long-standing Certificate Chain issue. However, even after resolving this, the problem remained. ...

Unfortunately, we have recently seen a strong increase in successful phishing attempts in the Science domain, a mailing about this issue was already sent last week. At the same time, we worked hard in collaboration with ILS to also deploy the centrally used anti-phishing tooling from Proofpoint for FNWI. The central RU mail environment has been supplemented with this highly effective anti-phishing measure for some time now. As soon as the Science mail domains are also placed ‘behind’ this anti-phishing tool, things will change for users who have not yet had to deal with this. More information can be found on https://www.ru.nl/ict/algemeen/proofpoint/. ...

Phishing Trying to acquire useful data, ie login credentials, for abusing someone else’s ICT infrastructure. Methods of phishing In general, phishing works by send a clickable link surrounded by an important message about Salary, payment or a prize, a punishment or fee. This distracts your rational mind and ensures your emotional response controls your mouse-clicking finger. Tip ...

Mailing lists Mailman lists are highly configurable and moderatable mailman mailing lists, e.g. the list of FNWI-employees or the list of FNWI-students. Usually one can add oneself to or remove oneself from such a mailman mailing list. Every mailman mailing list has a moderator, who can approve or reject messages to the mailman mailing list. For mailman list admins: To filter spam one can choose in the Privacy options... under Spam filters as Spam filter regexp: ...

Tip ...

Email codes overview ALICE-1 This is an email in which students are requested to participate in the digital course evaluation. Recipients? All students that are registered in OSIRIS for the exam of the corresponding course. When? Typically on the day of the exam (around 17:00). ALICE-2 This is an email reminder in which students are requested once again to participate in the digital course evaluation. Recipients? All students that are registered in OSIRIS for the exam of the corresponding course. When? Five days after the ALICE-1 email, so typically five days after the exam. ALICE-3 This is an email in which the feedback of the course are sent to the students. ...

Mozilla Thunderbird is free and open-source email client software. Below are instructions to configure Thunderbird for RU MS365 mail and for Science mail. Configure Thunderbird for RU MS365 mail. The RU MS365 instructions do not mention Thunderbird, but there is a RU created set of instructions (pictures in Dutch). Configure Thunderbird for Science mail. NB: For a self managed pc after installing Thunderbird you’ll have to uncheck Launch Mozilla Thunderbird now and click Finish. Last installation dialog screen ...

If one wants incoming mail to be sorted into folders automatically or to be filtered in some special way, one can use “Sieve” if one has the IMAP-server post.science.ru.nl as incoming mailserver. To put the sieve script on the mail server and activate it, use a mail program which supports sieve. The filter settings can be managed quite easily in Roundcube webmail with Settings -> Filters. It is also possible with e.g. KMail or Thunderbird with the sieve addon. On lilo4 you get with the command sieve-connect postvak.science.ru.nl an interactive commandline where you can use the command put to upload a sieve script. The Sieve language is described in RFC3028. ...

For unknown reasons, the IMAP mail server was unavailable. Mail services were halted after some time because of logging activity. As a temporary workaround logging is now performed using UDP instead of TCP.