protect small servers by rejecting new addresses under resource constraints / capping smtp/imap connection limits - #1019
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missytake
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Thanks for pushing this! Let's ask operators which limits they deem sufficient.
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Looks good to me, can't speak to the validity of the default limits; two robustness changes suggested.
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…ation and limit imap/smtp connections. The default values are geared towards minimal-requirements server. If you have a big server, you will need to set chatmail.ini parameters.
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Mainly, this PR rejects new address creation when system is under load, has not much RAM or disk storage left.
It also makes postfix/dovecot max connection limit available in chatmail.ini and lowers the defaults which were geared for nine.testrun.org operations.