Mailgun coûte 1 $ par mois pour 1 000 e-mails envoyés (et les 1 000 premiers sont gratuits)

[ToddZ]

For anyone researching Mailgun: as of this writing, it looks like the Mailgun Flex Plan is no longer available.

Current pricing indicates the free plan is limited to 100msg/day and the next tier is $15/mo.