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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 ...


    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


    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 -0800 724 26 59 · Vodafone Community · Weitere Services · MeinVodafone & E-Mail · smtp;rcpt error 550 5.7.25 client host rejected: c...


    Your server certificate is not valid because the computer host name or ...

    1. https://techdocs.broadcom.com
    2. endpoint-protection
    3. all

    2024/6/21 -Troubleshooting: Your server certificate is not valid because the computer host name or IP address changed. (14.3 RU8 or later). Last Updated June 21, 2024.


    iPhone mail client troubleshooting - DreamHost Knowledge Base

    1. https://help.dreamhost.com
    2. en-us
    3. articles
    4. 36005361...

    2024/6/13 -Review the steps above to ensure the hostname you've entered to connect is imap.dreamhost.com. This will resolve the error. Emails are bounced with a 'rejected ...


    Postfix - `permit_networks` does not work · Issue #2174 - GitHub

    1. https://github.com
    2. webmin
    3. webmin
    4. issues

    2024/5/27 -The issue. permit_mynetworks is not allowing my Windows PC (Outlook Client) with dodgy HELO commands to skip the HELO restriction policy. this means ...


    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-


    haxwell.de - AbuseIPDB User Profile

    1. https://www.abuseipdb.com
    2. user

    4日前 -... Client host rejected: cannot find your hostname, [14.231.113.114]; from ... Client host rejected: cannot find your hostname, [186.80.28.9]; from ...


    An IP address of a Plesk mail server got blacklisted. How to troubleshoot?

    1. https://support.plesk.com
    2. en-us
    3. articles
    4. 1237721640...

    4日前 -If an IP address/hostname/domain were added to a blacklist, it means that the server is/was considered as a source of spam. For Plesk on Linux: If spam emails ...


    SMTP Errors and Troubleshooting | SendGrid - Twilio

    1. https://www.twilio.com
    2. smtp-errors-and-troubleshooting

    2024/5/23 -The message was refused because the mailbox name is either malformed or does not exist. Remove these addresses from your list. 554, ERROR: Mail refused, This is ...


    Finding your email provider - Squarespace Help Center

    1. https://support.squarespace.com
    2. en-us
    3. articles
    4. 36000...

    2024/4/18 -Can't find what you're looking for? We'll help you find an answer or connect you with Customer Support through live chat or email. Contact Us. No results.