Conditions that might affect mail etc (7)

I believe the answer is:

climate

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'conditions that might' is the definition.
'climate' can be an answer for 'conditions' (I have seen 'Atmospheric conditions' mean 'climate' so perhaps 'conditions' could also mean 'climate'). I am not certain of the remainder of the definition.

'affect mail etc' is the wordplay.
'affect' indicates an anagram (I've seen 'affecting' mean this).
'mail'+'etc'='mailetc'
'mailetc' anagrammed gives 'CLIMATE'.

Can you help me to learn more?

(Other definitions for climate that I've seen before include "The regular weather conditions of a region" , "National weather conditions" , "Cite Mal (anag.)" , "Prevailing state" , "Prevailing trend" .)

I've seen this clue in The Telegraph and The Globe and Mail.

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