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    How to modify the MX records for sending to a specific email.

    The issue with sending to a specific email is as follows: Sep 19 17:22:50 pmg postfix/smtpd[1401914]: connect from localhost.localdomain[127.0.0.1] Sep 19 17:22:50 pmg postfix/smtpd[1401914]: BFD2FDE6189: client=localhost.localdomain[127.0.0.1]...
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    Remote Server returned '550 5.3.4 SMTPSEND.OverAdvertisedSize; message size exceeds fixed maximum size'

    How to set the size of sending attachments
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    Pop client settings

    I used proxmox as the mail gateway and associated with my exchange. But now when I set up the pop client, pop can only receive mail but can't send mail. How do I configure it
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    [SOLVED] Unable to send extraterritorial mail

    无法发送域外邮件
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