Last I saw, both M365 and Google only retry for 24 hours before returning as undeliverable.
-- William Brown WNYRIC/Erie 1 BOCES -----Original Message----- From: bind-users <bind-users-boun...@lists.isc.org> On Behalf Of Marcus Kool Sent: Wednesday, January 4, 2023 7:17 AM To: bind-users@lists.isc.org Subject: Re: Email migration and MX records ******** This email originated from outside of the organization. Use caution when replying, opening attachment(s), and/or clicking on URL's. ******** SMTP is a wonderful protocol that queues messages and retries delivery for 5 days so a non-responsive email server is no issue. Just do not have a temporary solution that bounces emails since those will never arrive (the sender is notified about the bounce). Confidentiality Notice: This electronic message and any attachments may contain confidential or privileged information, and is intended only for the individual or entity identified above as the addressee. If you are not the addressee (or the employee or agent responsible to deliver it to the addressee), or if this message has been addressed to you in error, you are hereby notified that you may not copy, forward, disclose or use any part of this message or any attachments. Please notify the sender immediately by return e-mail or telephone and delete this message from your system. -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
