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PMTA knowledge base›Configuration block§ 3.3.15

<smtp-pattern-list>

Parsing receiver responses
The only thing that turns on backoff mode

The block gathers rules for reacting to receiver responses during delivery. The mechanism is analyzed separately (smtp-pattern-list); this is about the block.

It lives at the top level and acts by reference from a receiver block. Without a reference the rules are not applied to any queue.

This is the only way into backoff mode. Directives with the backoff- prefix describe what will happen; a match here decides when (backoff-mode).

Do not confuse it with the sending address selection list — the name differs by one word, and it works on the opposite side of the node (<pattern-list>).

Example configuration
# the list and the reference to it — they do not work apart
<smtp-pattern-list block-errors>
    reply /^421 .* too many errors/ mode=backoff</smtp-pattern-list>
<domain aol.com>
    smtp-pattern-list block-errors
</domain>
The highlighted line is the only thing that puts a queue into backoff mode at all. We have no such block, and all our configured backoff mode is switched on only from outside, by the scheduler.
yellow — — directive names, blue — blocks. They are highlighted the same way in the text of the card.
Block directives: 1
Core 1
includeInclude a rules file inside a receiver response list
Compatibility
PowerMTA 6.0
described in the manual of this version · platform: any
The vendor does not state the first version for every directive — there is no note here. The name also appears in the 5.0 edition of the manual.
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Related entries

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Referenced from

Backoff mode — the queue's second personalityThe only thing that switches the mode on: an action on a match of the receiving server’s reply. § 3.3.10.53backoff-to-normal-after<domain>A mailbox provider rule can carry its own return period — and then this directive is ignored for that queue. § 3.3.10.53reenable-source-ip-after<domain>Ignored if a mailbox provider rule disabled the address with its own return deadline. § 3.3.10.56smtp-pattern-list<domain>The list itself is declared by this block; the line only attaches it to the recipient domain. § 3.3.10.101

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What else to read

3 articles

◇Two inbound report processors and what to do with themBounces by message and complaints are parsed by two identically structured blocks; each has its own address list and its own pair of decisions about the message’s fate.◇A return address with the recipient written into itThe bounce arrives at a unique address, and there is no need to parse its content.◇What to return in a bounce reportWhat to enclose in a bounce report: the whole message or only its headers.

In the Hub
Cost of a mistake
reversible: harms only while it is set
Scenarios
Bounce classification