Hi > 2021-06-29 mta214a-ord.mtasv.net [104.245.209.214] > 2021-06-29 mta216a-ord.mtasv.net [104.245.209.216] > 2020-11-25 mta200a-ord.mtasv.net [104.245.209.200]
Thank you. I can confirm, other customers (other domains on our platform) are getting email from those IP Addresses. So maybe Postmark put the domain of that recipient on an internal blacklist? We had such an issue with AWS SES some time ago, where one of our wholesale ISP customer's email domain was put on a SES internal 'do not send' list because 'they got a lot of spam complaints' from recipients in that domain. No AWS SES Customer could send emails to this domain and didn't get any useful error message. It took months for Amazon to look into that issue and solve it. Mit freundlichen Grüssen -Benoît Panizzon- -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________ _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
