Articles in this section

• Unable to send or receive e-mail messages: Client host rejected: cannot find your hostname
• Plesk Premium Email: Unable to access webmail.example.com: Internal Server Error
• Comodo certificate installed for the mail server. Mail client shows certificate expired
• [FIXED BUG] Unable to send email via PHP: Rejecting message: system user uid='XXXX' is not allowed to send mail
• How to add an email address/domain/top-level domain to the server-wide blacklist
• [FIXED BUG] Unable to create a mailbox in Plesk: mailmng-outgoing failed: ERROR:__main__:NOT NULL constraint failed: mails.domain_id
• Unable to send email via Gmail: TLS Negotiation failed, the certificate doesn't match the host
• Unable to receive mail on example.com
• Unable to select webmail for a domain while webmail software is installed on a server: none
• How to activate mail autodiscover for all existing domains on Plesk server?