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690 posts

Ultimate Geek


  # 1777001 6-May-2017 21:56
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Only just spied this. Disclosure: I worked for SMX several years ago.



If you're getting told your message is suspected spam when you send email to a system protected by SMX, then take it as read - your message is suspected to be spam. This is because at least one of the anti-spam engines they use (they use more than one) has returned a 'spam' verdict when they scanned your email during the SMTP transaction (so before accepting it). The error message goes on to say that you should contact with a copy of the message concerned, or phone them (0800 769 769).



Their stated false positive rate (as of a few years ago) was less than 4 per million SMTP transactions. Yes, FP's will happen. The main engines for detecting spam are signature based (similar to Antivirus) and will be imperfect. Also, people have a tendency to report email they don't want as spam, even if it's something they previously opted-in for (So it was never spam). That 'report as spam' button in many webmail interfaces is just too easy (out of sight, out of mind, and damn the consequences). So if you experience a FP situation it's really important to let them know it's wrong, so they can submit a correction. During their working hours FP's are usually corrected within several minutes.



SMX customers can usually access a web interface that'll show them details of emails that are accepted or rejected (metadata only; spam messages arent' retained or quarantined by default) and provides the means to put in whitelist/blacklist rules to work around system-wide limitations. Whitelisting doesn't fix the root-cause, but it can provide a temporary work-around. I don't know how this works for Xtra's new arrangement, but likely the Xtra Helpdesk could do similar for you.



Final point: SMX have had at least one production incident that affected mail flow through their NZ platform in the last 2 weeks, I can't recall the date (But my employer are an SMX customer and were affected).



Post reflects personal opinions only.

No signature to see here, move along...

1828 posts

Uber Geek

  # 1778300 9-May-2017 10:46
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Personally, I believe no company should use a spam filter.


I can't see how missing a customers email due a false positive is worth not having to press delete on a spam email on occasion.


It's not that hard to delete spam.


It's also not that hard to protect your email address from getting "out there" either.



Because companies have EMPLOYEES.
click, click click click any link they see in emails.
open emails without thinking . Open email attachments without thinking


so the choice is Spam Filter , or higher risk of the whole network being down for days after malware/crypto infection

A spam filter that moves spam to a email spam folder : not so bad as it can be checked . If you get hundreds of spams per day, then
its easy to get overwhelmed by it. So its then possible that legit emails get accidentally deleted as the staffer is overwhelmed by the volume of spam


Then you get companies who get Websites designed on the Cheap, by someone who hasnt a clue about hiding email addresses on websites .
I see far too much of this, then they complain about all the spam and will do nothing about the website .



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