On Tue, Jan 30, 2018 at 10:53:20PM -0600, Vladimir Hidalgo wrote: > smtp_destination_concurrency_limit = 1
Please read again what this setting does. Then remove it.
However I don't think GMail likes it to be used as mass mail sender.
> I see no conn_use on the log and I'm not sure if cache is also not
> supported on this SMTPS mode?
Nope, it is not.
Bastian
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Live long and prosper.
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