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greylisting [2009/06/09 22:20] adam |
greylisting [2016/11/25 22:38] |
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- | ===== Greylisting with Exim ===== | ||
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- | For greylisting with [[http:// | ||
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- | Install greylistd via apt for Debian and derivatives or ATrpms for Fedora/Red Hat and add your exim user to the greylist group, make sure / | ||
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- | defer | ||
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- | Mail from $sender_host_address as < | ||
- | < | ||
- | Please try again later. | ||
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- | ${if exists {/ | ||
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- | # !acl = acl_whitelist_local_deny | ||
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- | Placement of this snippet in the config is important. I place it in my ACL section, beneath the RDNSBL and ClamAV sample sections, so that bad senders detectable by other means still have to get through greylisting when they become delisted or send non-viral email. Other people put this config before other checks, the decision is yours. | ||
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- | The commented line was used in the Debian greylistd docs (possibly standard with greylistd) in / | ||
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- | Note that greylisting also has some disadvantages: | ||
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- | You can set your greylisting retryMin down to 10 seconds, you might get a slight increase in spam and lose the benefit that spammy senders will normally be blacklisted in RBLs within an hour, but you don't have to wait so long for real mail to get through if time is sensitive. | ||
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- | Other greylisting implementations: | ||
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- | This article has a large white list, a method to figure out mail servers from the domain SPF record and some other configuration tips: | ||
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- | [[http:// | ||
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