Hi. Yes its an expensive SMTP relay. There are probably cheaper systems out there which I am still investigating but they need to play nicely with the mailing list software. For example I tried to use Amazon Simple Email service which is cheaper but it insisted on re-writing the Message-Id header which breaks the threading in Mailman and causes a heap of issues with the archiver. With a lot of these systems they want you to send from a specific address only but some offer the ability to allow you to send from any address on the domain which is how I have this setup. This refers to the return envelope so we can do that for the lists. It does mean though that Sendgrid re-writes the return envelope to itself which causes problems for the list bounce processor as it will never receive incoming bounces as they go to Sendgrid instead. Most offer a free trial that allow around 100 emails a month, that may be ok for your use cases but for the lists that will be gone on the first message as I have over 100 subscribers each getting a single message per delivery. Sendgrid costs $20 per month for 50k emails a month, that is expensive in my book so I will continue to test for other providers. Andrew. -----Original Message----- From: Steve Nutt via Blind-sysadmins <blind-sysadmins@lists.hodgsonfamily.org> Sent: Tuesday, May 9, 2023 2:44 PM To: 'Mailing list for blind system administrators' <blind-sysadmins@lists.hodgsonfamily.org> Cc: Steve Nutt <steve@comproom.co.uk> Subject: [Blind-sysadmins] Re: Using Sendgrid as outbound mailer from now Hi Andrew, Yes, I'm getting the same problem on my Vultr instance. I can't send to iCloud addresses. How does Sendgrid work? Is it an SMTP relay? Thanks. All the best Steve -----Original Message----- From: Andrew Hodgson via Blind-sysadmins <blind-sysadmins@lists.hodgsonfamily.org> Sent: Tuesday, May 9, 2023 2:30 PM To: blind-sysadmins@lists.hodgsonfamily.org Cc: Andrew Hodgson <andrew.hodgson@contino.io> Subject: [Blind-sysadmins] Using Sendgrid as outbound mailer from now Hi. I’m now using Sendgrid as the outbound mailer on this list going forward. This is because my Ips are now blacklisted on Office365 which means even delivery to my own address isn’t possible. Honestly its really hard work running a mail server these days that isn’t one of the big companies. The disadvantage to this is that Mailman no longer handles bounce unsubscriptions so I need to be a bit careful here. Thanks. Andrew. -- CONTINO This e-mail, and any attachment, is confidential. If you have received it in error, please delete it from your system, do not use or disclose the information in any way, and notify me immediately. The contents of this message may contain personal views, which are not the views of industry, unless specifically stated. https://www.contino.io <http://www.contino.io> _______________________________________________ Blind-sysadmins mailing list -- blind-sysadmins@lists.hodgsonfamily.org To unsubscribe send an email to blind-sysadmins-leave@lists.hodgsonfamily.org _______________________________________________ Blind-sysadmins mailing list -- blind-sysadmins@lists.hodgsonfamily.org To unsubscribe send an email to blind-sysadmins-leave@lists.hodgsonfamily.org