How to know if a field_config_instance is safe to delete

What I did, and my findings: I installed commerce_product_bundles module for D7, and found that it leaves 5 orphaned field_config_instances in the database after uninstalling: commerce_unit_price, commerce_total, commerce_product, commerce_display_path, commerce_parent_line_item I think these are left because the module lacks a proper uninstall script, but I am not sure about that. The instances are all of…

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How to blacklist or reject external mail ids in fetchmail delivery?

We have configured fetchmail to fetch mails from catchall server and delivering to domain.If we send mail to online domain user [email protected] along with local zimbra user [email protected] and [email protected] means online user receiving 3 copies (1 original copy+2 cc copy).How to avoid duplicate mails from in postfix? Below configuration is used poll remote-host proto…

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