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We are long time SmarterMail users, having upgraded all the way from v4.0 to v14.5.
Over the years we have implemented most of the new 'deliverability" features as they've come out, e.g. SPF, Domain Keys and DKIM signing.
Over the past year or so, we have noticed a decline in our deliverability, and our investigation seems to indicate that the problem is that 1024 bit domain keys are no longer widely accepted, and we now need to upgrade to 2048 bit keys.
The issue is, there is no 2048 bit option in Smartermail 14.5 - we see only 512, 768, and 1024 options.
How are you guys generating 2048 bit domain keys for Smartermail?