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implement only monitoring dns blocklists, without using them for incoming deliveries

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so you can still know when someone has put you on their blocklist (which may
affect delivery), without using them.

also query dnsbls for our ips more often when we do more outgoing connections
for delivery: once every 100 messages, but at least 5 mins and at most 3 hours
since the previous check.
This commit is contained in:
Mechiel Lukkien
2024-03-05 16:30:38 +01:00
parent e0c36edb8f
commit 15e450df61
13 changed files with 305 additions and 83 deletions
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50
webadmin/admin.ts
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@ -333,6 +333,7 @@ const index = async () => {
dom.div(dom.a('MTA-STS policies', attr.href('#mtasts'))),
dom.div(dom.a('DMARC evaluations', attr.href('#dmarc/evaluations'))),
dom.div(dom.a('TLS connection results', attr.href('#tlsrpt/results'))),
dom.div(dom.a('DNSBL', attr.href('#dnsbl'))),
dom.div(
style({marginTop: '.5ex'}),
dom.form(
@ -361,9 +362,6 @@ const index = async () => {
),
// todo: routing, globally, per domain and per account
dom.br(),
dom.h2('DNS blocklist status'),
dom.div(dom.a('DNSBL status', attr.href('#dnsbl'))),
dom.br(),
dom.h2('Configuration'),
dom.div(dom.a('Webserver', attr.href('#webserver'))),
dom.div(dom.a('Files', attr.href('#config'))),
@ -2219,11 +2217,12 @@ const makeMTASTSTable = (items: api.PolicyRecord[]) => {
}
const dnsbl = async () => {
const ipZoneResults = await client.DNSBLStatus()
const [ipZoneResults, usingZones, monitorZones] = await client.DNSBLStatus()
const url = (ip: string) => {
return 'https://multirbl.valli.org/lookup/' + encodeURIComponent(ip) + '.html'
}
const url = (ip: string) => 'https://multirbl.valli.org/lookup/' + encodeURIComponent(ip) + '.html'
let fieldset: HTMLFieldSetElement
let monitorTextarea: HTMLTextAreaElement
dom._kids(page,
crumbs(
@ -2248,6 +2247,43 @@ const dnsbl = async () => {
})
),
!Object.entries(ipZoneResults).length ? box(red, 'No IPs found.') : [],
dom.br(),
dom.h2('DNSBL zones checked due to being used for incoming deliveries'),
(usingZones || []).length === 0 ?
dom.div('None') :
dom.ul((usingZones || []).map(zone => dom.li(domainString(zone)))),
dom.br(),
dom.h2('DNSBL zones to monitor only'),
dom.form(
async function submit(e: SubmitEvent) {
e.preventDefault()
e.stopPropagation()
fieldset.disabled = true
try {
await client.MonitorDNSBLsSave(monitorTextarea.value)
dnsbl() // Render page again.
} catch (err) {
console.log({err})
window.alert('Error: ' + errmsg(err))
} finally {
fieldset.disabled = false
}
},
fieldset=dom.fieldset(
dom.div('One per line'),
dom.div(
style({marginBottom: '.5ex'}),
monitorTextarea=dom.textarea(
style({width: '20rem'}),
attr.rows('' + Math.max(5, 1+(monitorZones || []).length)),
new String((monitorZones || []).map(zone => domainName(zone)).join('\n')),
),
dom.div('Examples: sbl.spamhaus.org or bl.spamcop.net'),
),
dom.div(dom.submitbutton('Save')),
),
),
)
}