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FastMail Forum All posts relating to FastMail.FM should go here: suggestions, comments, requests for help, complaints, technical issues etc. |
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6 May 2017, 11:56 AM | #16 | |
The "e" in e-mail
Join Date: Jul 2002
Location: VK4
Posts: 2,995
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Quote:
So Fastmail now are only giving us parts of sieve script....my god things are getting worse instead of better. |
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6 May 2017, 12:20 PM | #17 | |
Essential Contributor
Join Date: Apr 2008
Posts: 371
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Quote:
For whatever reason, one of the servers in FastMail's inbound mail stream is queuing and retrying messages that are rejected, essentially delaying delivery with an SMTP 421 error rather than bouncing the message outright. I created a few "reject" rules in my Sieve script to test this, and then proceeded to send messages to myself that would match those rules. While most of those messages silently disappeared, two very odd things happened.... 1. When I removed the rules, the messages I had sent, which I'd assumed were discarded, eventually showed up. 2. The messages sent for rules that weren't removed eventually resulted in "Delayed Mail" MDNs from MAILER-DAEMON@messagingengine.com, citing the host mailmx.nyi.internal as holding the message. Code:
This is the mail system at host mailmx.nyi.internal. #################################################################### # THIS IS A WARNING ONLY. YOU DO NOT NEED TO RESEND YOUR MESSAGE. # #################################################################### Your message could not be delivered for more than 1 hour(s). It will be retried until it is 1 day(s) old. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <myaddress@mydomain.com>: host mailmx.nyi.internal[/var/run/lmtpforward/incoming] said: 421 4.3.0 Unexpected delivery error - 550 5.7.1 Go away (reported by sloti29t02 in END OF DATA) via compute2 (in reply to end of DATA command) This is also why removing the "reject" rule in the Sieve script results in the message eventually getting through. Each time the upstream server retries delivery, the Sieve script is reprocessed, and if the "reject" rule has been removed by the time of the next attempt, the message will get through successfully. It's times like this that I wish some of the FastMail folks were still around here and actually paying attention, as this sound more like a bug in the system somewhere than intentional behaviour..... Bron? Rob? Anyone? |
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6 May 2017, 12:26 PM | #18 |
The "e" in e-mail
Join Date: Jul 2002
Location: VK4
Posts: 2,995
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I only used it to block about two nuisance people, but now will just use an modified auto reply.
Some sieve rules wont work if you have don't discard mail from known senders. |
6 May 2017, 12:42 PM | #19 | |
Essential Contributor
Join Date: Apr 2008
Posts: 371
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Quote:
In essence, what turning on the "Do not discard messages sent by my contacts" option does is add an extra wrapper around section 3 in the predefined chunk of the Sieve script that only runs the spam rules if the e-mail is not from a "known sender" (specifically, if not header :matches "X-Spam-Known-Sender" "yes*"). So if you have that option on, and a message comes in from a known sender, the spam filtering block gets skipped entirely, but the rest of the Sieve script continues along its merry way. |
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6 May 2017, 12:57 PM | #20 | |
Intergalactic Postmaster
Join Date: May 2004
Location: Irving, Texas
Posts: 8,917
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Automatic responses are usually a bad idea
Thanks for the kind words ... I'm blushing, Fred!
Quote:
As jhollington properly stated, the From address (and sometimes the envelope From address) are often set to an innocent person's address. If you reply in any way to spam or phishing or scam emails you are sending a message with one of the following results:
Bill |
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6 May 2017, 01:01 PM | #21 |
The "e" in e-mail
Join Date: Jul 2002
Location: VK4
Posts: 2,995
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Thanks Bill...
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10 May 2017, 02:23 PM | #22 |
The "e" in e-mail
Join Date: Jul 2004
Location: Melbourne, Australia
Posts: 2,696
Representative of:
Fastmail.fm |
Did you submit a support ticket about this? It's the first I've seen of the issue being mentioned, but yes - it does look like an unintentional side-effect of a change that's been in place for... about 2 years I think!
I'll create a development ticket for it. |
10 May 2017, 02:33 PM | #23 | |
Intergalactic Postmaster
Join Date: May 2004
Location: Irving, Texas
Posts: 8,917
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Quote:
Bill |
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10 May 2017, 02:38 PM | #24 |
The "e" in e-mail
Join Date: Jul 2004
Location: Melbourne, Australia
Posts: 2,696
Representative of:
Fastmail.fm |
Ahh, I see n5bb emailed about it as well, so Rob was looking at it separately. We've tracked down the cause - upstream Cyrus sieve changes that made it reply back to the sending MTA asking for a bounce rather than generating the bounce in-process.
We're working on a fix to make those bounces go back out immediately. |
10 May 2017, 02:46 PM | #25 |
Intergalactic Postmaster
Join Date: May 2004
Location: Irving, Texas
Posts: 8,917
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Thanks, Bron. I just sent you an attachment with the "delayed message being retried" email. I originally forgot the attachment when I forwarded my message to Rob M to you.
Bill |
10 May 2017, 02:51 PM | #26 | |
The "e" in e-mail
Join Date: Jul 2002
Location: VK4
Posts: 2,995
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Quote:
Sorry my apologies... Also check the return emails as currently its showing my main Fastmail address which I never give give out also with my alias. |
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10 May 2017, 02:56 PM | #27 | |
Intergalactic Postmaster
Join Date: May 2004
Location: Irving, Texas
Posts: 8,917
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Quote:
Bill |
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10 May 2017, 03:10 PM | #28 |
The "e" in e-mail
Join Date: Jul 2002
Location: VK4
Posts: 2,995
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Yea.....very quick.
I long time ago I would email Rob and I am thinking seriously about doing that again rater than post on here and upset everyone. I got cranky for various reasons I have mentioned before. I'm no computer whizz kid so for me to find a work round takes a little bit longer than most. |
10 May 2017, 03:11 PM | #29 |
The "e" in e-mail
Join Date: Jul 2004
Location: Melbourne, Australia
Posts: 2,696
Representative of:
Fastmail.fm |
Yep, we'll definitely check what postfix does, and if it's starting to include the eventual destination address then we'll figure out a way to strip that back out of bounces.
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11 May 2017, 12:08 AM | #30 | |
Essential Contributor
Join Date: Dec 2003
Location: Dover, NH, USA
Posts: 315
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Quote:
I only get sporadic SPAM these days so its not too bad... |
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