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    • 450 4.7.1 Client host rejected: cannot find your hostname - Plesk Support

    1. https://support.plesk.com
    2. en-us
    3. articles
    4. 1237714009...

    2024/4/18 -Cause. Incorrect or missing PTR record of the sender's mail server. Resolution. Contact the server hoster or provider of the IP address in ...


    Resolving Postfix Issue: "450 4.7.1 Client host rejected: cannot find ...

    1. https://www.mydreams.cz
    2. MyDreams VPS Hosting
    3. Wiki

    2024/4/7 -1 Client host rejected: cannot find your reverse hostname" when sending emails using Postfix. This issue is typically associated with DNS configuration and can ...


    smtp;rcpt error 550 5.7.25 client host rejected: cannot find your hostname

    1. https://forum.vodafone.de
    2. MeinVodafone-E-Mail
    3. td-p

    2024/5/3 -arcor.de-Mailserver / zoho.com / Reverse DNS in MeinVodafone & E-Mail 03.04.2024 · Battlenet Mail kommen nicht an in MeinVodafone & E-Mail 27.02.2024 ...


    hostname does not resolve to address - Proxmox Support Forum

    1. https://forum.proxmox.com
    2. threads
    3. hostname-does-no...

    2024/1/19 -... Client host rejected: cannot find your hostname​. I solve it by whitelisting the sender domain, which in this case was a @umich.edu addy. My guess is that ...


    sasl - Can postfix enforce reject_unknown_helo_hostname ...

    1. https://serverfault.com
    2. questions
    3. can-postfix-enforce-r...

    2024/2/23 -Although I think my saslauth is fairly secure, I would prefer if they couldn't even try. Is there no way to get the "unknown" hostname to be rejected earlier?


    arcor.de-Mailserver / zoho.com / Reverse DNS - Vodafone Community

    1. https://forum.vodafone.de
    2. MeinVodafone-E-Mail
    3. td-p

    2024/4/3 -Upon reviewing our logs, the emails sent to @Arcor.de were rejected with the error message "4.7.25 Client host rejected: cannot find your reverse hostname, [ ...


    Client host rejected: cannot find your hostnameに関するQ&A（2件）

    Yahoo!知恵袋

    Q.メールについて教えてください。 仕事で海外の取引先とメールのやり取りをしているのですが、取引先より特定のアドレスからメールの送信をするとエラーが出て送信できないとの事。 取引先のIT技術者は受...

    回答：2件-

    Q.メールを送信し、5日後の今日になって 件名「Undelivered Mail Returned to Sender」というメールが「MAILER-DAEMON@mail.自分のドメイン」から届き...

    A.くみちゃんさんのおっしゃっていることに補足ですが、送信元の IP アドレスに対して適切な DNS レコードが設定されていないことが原因のように思われます。 cannot find your h...

    解決済み-回答：4件-


    My e-mails are blocked : r/tutanota - Reddit

    1. https://www.reddit.com
    2. my_emails_are_blocked

    2024/6/20 -450 4.7.25 Client host rejected: cannot find your hostname, [185.205.69.214] (in reply to RCPT TO command). Is this a general error? How to fix it? Upvote 18


    Mail is not sent to any addresses or from any mail or server

    1. https://forum.hestiacp.com
    2. mail-is-not-sent-to-any-addre...

    2024/3/10 -3. bestperson: 450 4.7.1 Client host rejected: cannot find your reverse hostname, [5.35.82.146]. probaly your issue. bestperson: SMTP error from remote mail ...


    急に送信が不可能になりました。アカウントなどの変更も出来ません。

    1. https://answers.microsoft.com
    2. forum
    3. all
    4. 急に送信が

    2024/6/19 -カタカナ表記のエラー は client host rejected: cannot find your hostname ... 1 Client host rejected: cannot find your hostname， [IPアドレス]」という ...


    Outlook 2007 and other old mail clients not able to use SSL/TLS ...

    1. https://support.plesk.com
    2. en-us
    3. articles
    4. 1237785560...

    2024/3/20 -Symptoms. Old mail client such as Outlook 2007 is not able to send a mail via SSL/TLS. The log file /var/log/maillog contains one of the following error ...