A few episodes ago on MPU, David mentioned that he has a 2 minute delay on all outgoing email on his Mac. I believe that he mentioned that Sanebox makes this possible. I really like this idea and I would like to implement it but I don’t think this one feature justifies a Sanebox subscription for me. I was wondering if their is a way to add this to Mail.app using a free or single time payment program or by scripting. I am also open to any suggestions for third party mail clients that offer this feature as well, but I have already looked at a few of them like Outlook and Spark which don’t offer this as an option.
I use Airmail which offers an “undo send” feature which can be set to 5 or 10 seconds. Not as good as 2 minutes - but plenty for my needs most of the time.
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If memory serves, David referenced the Mail Act-On plugin for macOS Mail. Among other things, it adds the ability to delay sending of emails and to schedule them for a specific time.
I use both Mail Act-On and Mailbulter, another macOS Mail plugin. Mailbulter can also be used to delay and schedule emails.
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Thanks for responding! Do you use Airmail on iOS as well? I have heard mixed reviews about it on iOS, mainly about stability.
I use it on iOS and it’s been solid for me recently. I use it on the Mac less mostly because I’m not on the Mac much!
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I just signed up for mail butler, it looks like its undo send feature is exactly what I wanted, though the maximum amount of time that the message can be delayed by is only 1 minute. Thanks for your help!
Yup … Mail Butler does this. I use Mail Act-On but I’ve used Mail Butler in the past.
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@Lontronix - You can specify the delay by going to Preferences > MailButler > Delivery. I normally have this set to 10 seconds (which I think is the default). I tried increasing it two two minutes (120 seconds) and it seemed to work just fine.
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That isn’t the screen I see, I have attached below what I see. Perhaps it’s because we are on different plans (I’m on essential)? I configured the delay send feature on the web and it had a drop down menu with a maximum of 2 minutes. 
Interesting. I’m on the Business plan. If you haven’t already, you might want to check out Mailbulter’s Knowledge Base and contact their support team if you don’t find the answer you’re looking for.
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ok, thanks for your help
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Mail Act On is how I do this and more. I also like the email scheduling feature, but it does require that the Mac be on and email client open.
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At one time it was unstable for me but it has been rock solid for me now. It has a great feature set.
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if you’re looking for an ios app i recently started playing with “Spark” and it let’s you send email at a scheduled time.