Adding account in Outlook failing with bogus write-protected message
Outlook fails: We couldn’t create the Outlook data file. Make sure the disk you’re saving to isn’t full or write-protected and that the file isn’t
WHM/cPanel .EML files triggering “This message has been rejected because it has a potentially executable attachment”
WHM/cPanel might trigger a bounce such as the following: 2023-03-14 20:11:01 1pc96v-0007q4-15 cancelled by system filter: This message has been rejected because it has\na potentially
How to automatically reject an email message to a recipient in Postfix
Background To automatically reject an email message using Postfix, you can set up a smtpd_recipient_restrictions rule in the Postfix configuration file located at /etc/postfix/main.cf Why
How to deal with “The message store has reached its maximum size. To reduce the amount of data in this file, permanently delete some items that you no longer need.” looping
Background At times Outlook might start looping for power users. The messages received is: > The message store has reached its maximum size. To reduce
Bogus “Reverse DNS does not match SMTP Banner” using MX Toolbox on a WHM server
When testing Email Health using MX Toolbox, you might get 3 false positives: smtp server.example.com Reverse DNS does not match SMTP Banner More Info smtp
Outlook Mac error – The total attachment size exceeds the limit. Try removing one or more attachments before saving or sending.
On Outlook for Mac version 2016 connected with IMAP to a Kopano server, you might experience the following: The total attachment size exceeds the limit.
Postfix issue: warning: you may need to increase the main.cf local_destination_concurrency_limit from 2
On a really busy Postfix server you might encounter the following issue: Jan 18 16:41:21 mail postfix/qmgr[1669]: warning: you may need to increase the main.cf
How to change the log file date format on a Virtualmin Postfix server
Background I gave myself this task because I wanted to write an advanced script that can: Extract a ban from fail2ban based on IP address,
Bogus WHM reverse DNS, TLS, and Transaction Time problems testing a site using MX Toolbox Email Health
MX Toolbox might report bogus problems with testing a fully protected WHM domain. These warnings will take the forms of the following: 3 Problems Reverse
How block an email address using Usermin (Virtualmin)
In order to block an email address using Usermin, one has to log into the Usermin interface. The URL is typically: https://mail.server.com:20000 After login, you