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Undeliverable responses

Let's begin with the illustration of the problem with undeliverable responses:

Imagine a situation you are expecting a very important package. The question is: do you release your dogs to prohibit the postman to deliver the parcel? We believe not - you will keep your dogs leashed. The question is, why people don't do the same in case e-mails. Using other words: if you think the e-mail from us is important, please leash your dogs (e.g. anti-spam filters) to allow the postman to deliver it.

Cases where our postman complains about "unleashed dogs" / other problem with delivering our response:

date sender server respond / note
23rd Jun support@xxx-xxxx.rs host aspmx.x.xxxxxx.com[xx.xxx.x.xx] said: 550-5.1.1 The email account that you tried to reach does not exist.
24th Oct sales3@xxxxxxxxxx.com.cn and
sales@xxxxxxxxxx.com.cn
Message has not been sent. Server reply - 4.1.2 : Recipient address rejected: Domain not found.
22nd Feb fae_clpe@xxxxxxxxxx.com.cn and
sales3@xxxxxxxxxx.com.cn and
sales@xxxxxxxxxx.com.cn
host mail.xxxxx.sk[11.222.333.44] said: host xxxx.yyy.com.cn[111.222.33.444] said: 550
Does not like recipient,your mail is rejected! (in reply to end of DATA command).
20th Feb luscik.martin@xxxxx.sk host mail.xxxxx.sk[11.222.333.44] said: 554 Mail from xxxxxxx@elnec.com rejected for policy reasons.
Nas komentar: Odporucame pouzit menej paranoidny e-mail server.
17th Jul Tichy@xxxxxx.cz
not joke, the same person
host mailer.xxxxxx.cz[11.22.333.44] said: 550 5.7.1 Dobry den, Vase zprava byla odmitnuta z duvodu prezence na seznamu RBL spolecnosti SpamCop, www.spamcop.net . Hello, your message was rebuffed because of presence on SpamCop RBL, www.spamcop.net.
Nas komentar: ked viac verite SpamComp ako Elnec, nedostanete od Elnec postu.
25th May tichy@xxxxxxxxxxxxxxxx.cz host mail.xxxxxxxxxxxxxxxx.cz[111.22.333.444] said: 550
18th May vipah@xxxxxx.cz host mx50.xxxxxx.cz[11.22.33.44] said: 552 4.2.2 User has full mailbox. Again. And 2012-05-25 too!
16th May vipah@xxxxxx.cz host mx50.xxxxxx.cz[11.22.33.44] said: 552 4.2.2 User has full mailbox. Smart!
31st Mar sales3@xxxxxxxxxx.com.cn mx32.dns.com.cn[119.254.72.172] said: 551 217.198.112.165 is listed in RBL!
9th Jan autoxray@xxxxxxx.com host xxx.yyyyyyy.com[11.22.33.444] said: 550 SC-001 (SNT0-MC1-F46) Unfortunately, messages from 217.198.112.157 weren't sent.
9th Jan ono21@xxxxxxx.nl host xxx.yyyyyyy.com[11.22.33.444] said: 550 SC-001 (SNT0-MC1-F46) Unfortunately, messages from 217.198.112.157 weren't sent.
19th Dec chunwe.lai@xxxxxxx-yyy.com The recipient's e-mail address was not found in the recipient's e-mail system. Microsoft Exchange will not try to redeliver this message for you.
12th Oct Helpdesk@xxx.it 'very smart' host mail.xxxx.it[111.222.333.4] said: 554 Sorry, message looks like SPAM to me (in reply to end of DATA command)

Notes:
1) If you have found your correctly spelled E-mail address in the list please arrange solving of the problem with your post server / E-mail service provider. After the problem is solved, please contact us and we will be happy to respond to your previous inquiery and to remove your E-mail address from the list.
2) If you have found your incorrectly spelled E-mail address in the list please contact us again with correct E-mail address and we will be happy to respond to your previous inquiery and to remove your incorrectly spelled E-mail address from the list.


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25th - 27th Apr 2017
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hall no.: Hall 1
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