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mx1.dynu.com does not seem to honor status 450
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- mx1.dynu.com does not seem to honor status 450
Topic: mx1.dynu.com does not seem to honor status 450
When email is being delivered I still perform valid domain checks. The system will then return stars 450 like so450 4.1.8 <Cut_the_Cord@circus.selfiji.us>: Sender address rejected: Domain not found;It appears that mx1 does not interpret this properly and attempts to resend the email. What is the expectation for the Email Store/Forward service when the destination does not want to accept the email?thanks
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You are correct about this and we will create a setting (enabled by default) to handle this. IN the meantime, you can use the Delivery Address feature to permanently stop deliveries for unavailable mailboxes.Thank you very much for this feedback!
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jguarini wrote:When email is being delivered I still perform valid domain checks. The system will then return stars 450 like so450 4.1.8 <Cut_the_Cord@circus.selfiji.us>: Sender address rejected: Domain not found;It appears that mx1 does not interpret this properly and attempts to resend the email. What is the expectation for the Email Store/Forward service when the destination does not want to accept the email?thanks
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rahsharma wrote:Actually, 450 is a temporary error while 550 would be the permanent error. Couple examples below:450 Requested mail action not taken: mailbox unavailable (e.g., mailbox busy)550 Requested action not taken: mailbox unavailable (e.g., mailbox not found, no access, or command rejected for policy reasons)Would you be able to configure your email server to respond with 550 instead of 450?jguarini wrote:When email is being delivered I still perform valid domain checks. The system will then return stars 450 like so450 4.1.8 <Cut_the_Cord@circus.selfiji.us>: Sender address rejected: Domain not found;It appears that mx1 does not interpret this properly and attempts to resend the email. What is the expectation for the Email Store/Forward service when the destination does not want to accept the email?thanks
wrote:Apr 24 19:39:23 mail postfix/smtpd[9573]: NOQUEUE: reject: RCPT from mx1.dynu.com[207.38.70.35]: 450 4.1.8 <WarrantyNotice@dead.warrantycarsdirected.u>: Sender address rejected: Domain not found; from=<WarrantyNotice@dead.warrantycarsdirected.u> to=<zzzz@XXX.yyy> proto=ESMTP helo=<mx1.dynu.com>
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Author | Topic: mx1.dynu.com does not seem to honor status 450 |
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jguarini Joined: 2/27/2017 |
![]() Wednesday, April 19, 2017 5:02 PM
When email is being delivered I still perform valid domain checks. The system will then return stars 450 like so450 4.1.8 <Cut_the_Cord@circus.selfiji.us>: Sender address rejected: Domain not found;It appears that mx1 does not interpret this properly and attempts to resend the email. What is the expectation for the Email Store/Forward service when the destination does not want to accept the email?thanks
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timothytw Joined: 5/2/2002 |
![]() Thursday, April 20, 2017 10:07 AM
You are correct about this and we will create a setting (enabled by default) to handle this. IN the meantime, you can use the Delivery Address feature to permanently stop deliveries for unavailable mailboxes.Thank you very much for this feedback!
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rahsharma Joined: 11/25/2010 |
![]() Friday, April 21, 2017 1:30 PM
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jguarini Joined: 2/27/2017 |
![]() Monday, April 24, 2017 7:42 PM
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jguarini Joined: 2/27/2017 |
![]() Monday, April 24, 2017 8:03 PM
ok, now replying with 550. Let's see how that goes.Thanks
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Saturday, September 7, 2024 5:21 PM