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A comment on A serverless email server on AWS using S3 and SES. Parent comment

Re:A serverless email server on AWS using S3 and SES by ungrateful-dead on Friday April 30, 2021 @10:38AM (#26994025)
In cost? Running postfix.org mail sever on a VM must have a nonzero cost, with the additional need to maintain the underlying OS.
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Re:A serverless email server on AWS using S3 and SES by caymanjim on Friday April 30, 2021 @11:09AM (#26994425)
EC2 micro instances are free.
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Re:A serverless email server on AWS using S3 and SES by beagle3 on Friday April 30, 2021 @04:16PM (#26998734)
but are often blacklisted as SMTP sources, unfortunately.
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Re:A serverless email server on AWS using S3 and SES by joana035 on Friday April 30, 2021 @05:21PM (#26999516)
Not really, only if it the IP was used to delivery spam.

But IP reputation can be established with a bit of warm up and human interaction.

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