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Email Comments, Questions and Miscellaneous Share your opinion of the email service you're using. Post general email questions and discussions that don't fit elsewhere. |
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19 Feb 2017, 08:14 AM | #1 |
Junior Member
Join Date: Nov 2008
Posts: 17
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Can't Block
I have Outlook and I'm wondering does anyone have any insight into what's happening with these spam messages that can't be blocked because the address is invalid, another example of email's I can't block are when they use my own email address to message me, how does that even work ?
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11 Mar 2017, 02:53 AM | #2 |
Junior Member
Join Date: Mar 2017
Location: Burnaby
Posts: 2
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Microsoft . . .
Boggles my mind why there is not a fix for this.
Try setting up the following filter: Block all emails within "<" and ">" or more practical would be to delete any email that contains @exe If it's an invalid domain, it shouldn't be going through in the first place. Microsoft . . .*Sighs* |
11 Mar 2017, 04:38 AM | #3 |
Ultimate Contributor
Join Date: Dec 2001
Location: Canada.
Posts: 10,355
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Do a search for 'backscatter spam' - without the quotes.
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11 Mar 2017, 05:37 PM | #4 | |
Junior Member
Join Date: Oct 2016
Location: CZ & USA
Posts: 21
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Quote:
Setup anti-forgery for the domain like SPF, DKIM and DMARC and enable these checks on inbound traffic. Pavin. |
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12 Mar 2017, 06:05 AM | #5 | ||
Intergalactic Postmaster
Join Date: May 2004
Location: Irving, Texas
Posts: 8,930
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Quote:
Much random spam comes with the From header set to a pseudorandom email address. Since you are unlikely to get two messages with that same From address, it may not be useful to block such random one-time spam. Valid commercial senders which repeatedly send you advertising you don't want are best dealt with by using the typical unsubscribe link at the bottom of the message. When you say that the address is invalid, random spam (where the sender doesn't care about getting a delivery failure notification) is sent with either an empty or fake From address. There are two From and To addresses:
Quote:
The backscatter spam that David mentioned is when a spammer spoofs your email address in the envelope From and/or header From for their messages to innocent people. The innocent destination email system (or recipient) "bounces" a message back to the sender (which is your email address). Some email systems have a special backscatter filter which will file the bounces into your spam folder, but usually there is nothing you can do about this. Most email systems use antispam filters and other systems to eliminate some of these messages, but it's impossible to completely eliminate them using our current email standards. There are newer standards (SPF, DKIM, and DMARC) which can help, but these are not used by all systems and they still don't solve the problem of a spammer who sets up their system so it generates perfectly good looking messages using SPF/DKIM/DMARC but contains damaging content (such as a phishing link). If you want to receive only email from a few known senders which use SPF/DKIM/DMARC, you can block all spam. But most of us want to receive random incoming messages from senders we haven't preidentified, and so some spam is still possible in your Inbox even with good antispam filtering. The spammers are very ingenious! It's the email equivalent to "fake news". Bill |
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