Thanks Hans; I appreciate the fast reply. Your response comports with our understanding as well, but felt we should ask.
All the best, Mark _________________________________________________________________ L. Mark Stone, Founder North America's Leading Zimbra VAR/BSP/Training Partner For Companies With Mission-Critical Email Needs ----- Original Message ----- From: "Hans-Martin Mosner via mailop" <[email protected]> To: "mailop" <[email protected]> Sent: Friday, December 15, 2023 9:21:30 AM Subject: Re: [mailop] Incoming spam from outlook.com Am 15.12.23 um 14:49 schrieb L. Mark Stone via mailop: > We too are seeing high volumes of such email. > > Historically, we have avoided deploying greylisting*, but are curious if > greylisting would block these emails? Could anyone who is doing greylisting > comment on whether these garbage emails are being resent? Greylisting is generally ineffective against spam sent through a regular e-mail infrastructure. It only helps when the sending software is either set up to avoid retries or the sending IP is only used for a very short interval. Spam sent via accounts on freemailers is generally hard to reject without resorting to content filtering. In some cases (when accurate Received-lines are present) you may be able to filter based on header information, but some providers (such as Google) hide this information, presumably to protect the privacy of their users. Cheers, Hans-Martin _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
