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implement limits on outgoing messages for an account

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by default 1000 messages per day, and to max 200 first-time receivers.
i don't think a person would reach those limits. a compromised account abused
by spammers could easily reach that limit. this prevents further damage.

the error message you will get is quite clear, pointing to the configuration
parameter that should be changed.
This commit is contained in:
Mechiel Lukkien
2023-03-28 20:50:36 +02:00
parent 9bd497b836
commit 9b57c69c1c
14 changed files with 262 additions and 4 deletions
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4
config/config.go
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@ -243,7 +243,9 @@ type Account struct {
NeutralMailboxRegexp string `sconf:"optional" sconf-doc:"Example: ^(inbox|neutral|postmaster|dmarc|tlsrpt|rejects), and you may wish to add trash depending on how you use it, or leave this empty."`
NotJunkMailboxRegexp string `sconf:"optional" sconf-doc:"Example: .* or an empty string."`
} `sconf:"optional" sconf-doc:"Automatically set $Junk and $NotJunk flags based on mailbox messages are delivered/moved/copied to. Email clients typically have too limited functionality to conveniently set these flags, especially $NonJunk, but they can all move messages to a different mailbox, so this helps them."`
JunkFilter *JunkFilter `sconf:"optional" sconf-doc:"Content-based filtering, using the junk-status of individual messages to rank words in such messages as spam or ham. It is recommended you always set the applicable (non)-junk status on messages, and that you do not empty your Trash because those messages contain valuable ham/spam training information."` // todo: sane defaults for junkfilter
JunkFilter *JunkFilter `sconf:"optional" sconf-doc:"Content-based filtering, using the junk-status of individual messages to rank words in such messages as spam or ham. It is recommended you always set the applicable (non)-junk status on messages, and that you do not empty your Trash because those messages contain valuable ham/spam training information."` // todo: sane defaults for junkfilter
MaxOutgoingMessagesPerDay int `sconf:"optional" sconf-doc:"Maximum number of outgoing messages for this account in a 24 hour window. This limits the damage to recipients and the reputation of this mail server in case of account compromise. Default 1000."`
MaxFirstTimeRecipientsPerDay int `sconf:"optional" sconf-doc:"Maximum number of first-time recipients in outgoing messages for this account in a 24 hour window. This limits the damage to recipients and the reputation of this mail server in case of account compromise. Default 200."`
DNSDomain dns.Domain `sconf:"-"` // Parsed form of Domain.
JunkMailbox *regexp.Regexp `sconf:"-" json:"-"`