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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 ...


    [SOLVED] - 450 4.7.1 Client host rejected: cannot find your hostname

    1. https://forum.proxmox.com
    2. threads
    3. 450-4-7-1-client-...

    2023/12/31 -Hi. What the problem and how to fix ? My custom template: PTR is correct: UPD: My PTR record was not correct.


    Cannot send mail messages from Plesk server. Client host rejected

    1. https://support.plesk.com
    2. en-us
    3. articles
    4. 1237779752...

    2023/8/2 -Symptoms. Mails are not sent to a specific address. The following messages can be found in the /var/log/maillog file: Reason: Remote SMTP Server Returned: ...


    Mail error: 550 5.7.25 Client host rejected: cannot find your hostname ...

    1. https://forum.virtualmin.com
    2. mail-error-550-5-7-25-clie...

    2023/12/1 -I have another issue that bugs me from time to time: When using webmail from some receivers I get a bounce with: 550 5.7.25 Client host rejected: cannot ...


    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 ...


    MDaemon Error - Collaboration - Spiceworks Community

    1. https://community.spiceworks.com
    2. Collaboration
    3. email

    2023/11/28 -450 4.7.1 Client host rejected: cannot find your reverse hostname. i am receiving this error message and i have already set up my dns records properly.


    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-


    sasl - Can postfix enforce reject_unknown_helo_hostname ...

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

    2024/2/24 -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?


    DNS issue - Spectrum Community

    1. https://community.spectrum.net
    2. discussion
    3. dns-issue

    2023/8/8 -25 Client host rejected: cannot find your hostname, [91.199.28.25]; from=<support@portmone.com>... When I do nslookup on the same machine, I get: nslookup ...


    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 ...