This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Hi Max, I took at look at the rejected email you forwarded to my personal address. Your message was blocked because the outlook.com IP address used as a mail relay for your message was on a block list. We've seen this before from organizations who use Microsoft corp (outlook.com) relaying mail. Unfortunately, a lot of spammers utilize this outlook.com service, causing a number of the outlook.com IP addresses to be added to spam block lists. A legit user, like yourself, then attempts to send an email which is routed through the blocked IP relay, resulting in the rejection message you received. (The information provided in the in the rejection message you forwarded explains all of this in more detail.) In case you wanted more information about the issue, this thread may be of interest to you: https://www.reddit.com/r/sysadmin/comments/11m2dza/outlookcom_has_an_ip_listed_on_spamcop/ Unfortunately, there is nothing we can do about this on our end, as the spam filter service we use is the one who handles the block list. Be aware that other entities use the same spam block list service, so this could happen again to you in the future if one of your outgoing emails gets routed through a blocked IP. I would recommend notifying your systems group of the problem. In the meantime, if you receive a similar rejected email in the future when attempting to contact us, please send your request in using a personal email address. Additionally, we will have a new support system online in the next few days which provides a web form you can utilize to send in your support requests. Please let me know if you have any questions! Kind regards, Jennifer Ticket Details =================== Ticket ID: KOZ-297880 Department: Support Python Priority: Low Status: Open =================== NOTE: All email exchanges with NSF Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.