日本語のみで絞り込む
2025/3/4 -Resolution. Contact the server provider of the IP address in order to correct PTR record and make it point to the mail server hostname. For ...
2014/12/23 -You need a PTR record that resolves 128.199.39.109 to the hostname of your sending server. Might also want to look into SPF records for your ...
2013/11/22 -Check the DNS settings on the outbound mailserver. Make sure you alse have a PTR record set up for the hostname that is send with the EHLO/HELO ...
2018/8/22 -I'm currently messing around with my mail-setup here. Everything is working properly except receiving mails (which should obv. work). I'm running the setup in ...
2021/12/9 -450 4.7.1 <remote.ourhostname.com>: Helo command rejected: Host not found · When any IP address sends any spam links or data, then generally that ...
2018/9/26 -Unknown clients are hostnames not matching or existing (FCrDNS) of the sending mailserver, unknown senders checks, if the domain of the sender address exists.
2014/10/26 -The ALTERNATE fix is to loosen your postfix restrictions from "reject_unknown_sender_domain" to "reject_unknown_reverse_client_hostname". But ...
2021/2/16 -Checks against the hostname are needed to ensure that the hostname is properly resolving to the server. Here are the commands needed to perform this check.
2022/1/27 -If the Exchange server cannot find the sender of the mail or the host name, then an Exchange error 450 4.7.1 is generated indicating that the ...
2013/11/8 -When a user here sends an email to a particular domain it bounces back with: 450 4.7.1 Client host rejected: cannot find your hostname.