About how many emails are you sending per second/minute/hour that the third party service is having trouble with sending these out? Spam is always an issue and a risk when you are an email service provider, but unless you are sending out in the hundreds of thousands per hour, something tells me you would be okay.
When you are setting up your own email service to send large amount of emails, you should probably keep these in mind:
Make sure your SPF records are accurate and they stay that way
Incorporate DKIM to complement your SPF records; they aren't widely recognized yet but ISPs like AOL will bounce you away if you don't have DKIM
Validate the HTML you use in your emails so that you aren't flagged as looking spammy
Warm up your IP by sending out solid transactional emails over time and not have people report it as spam
Use external services to check out the status of your IP; the last thing you want is to be blacklisted by large email providers like Gmail, Hotmail, and AOL
There are no real risks with rolling your own mail delivery service, aside from what happens if your IP gets blacklisted from major providers, and what happens to the emails you send when your server is down?
I always advise people to go for third party email providers because it will save you headaches going forward - you can just expect the email to be sent and arrive at the inbox and you won't have to worry about anything.
(Full Disclosure: I am the Product Manager of PostageApp, we have tons of people asking us why go for a third party solution.)
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您每秒/分钟/小时发送了多少封电子邮件，而第三方服务在发送这些电子邮件时遇到了问题？当您是电子邮件服务提供商时，垃圾邮件始终是一个问题和风险，但除非您每小时发送数十万封邮件，否则我会告诉您您会没事的。
当您设置自己的电子邮件服务来发送大量电子邮件时，您可能应该记住以下几点：
除了您的 IP 被主要提供商列入黑名单时会发生什么以及发生什么情况之外，推出自己的邮件递送服务并没有真正的风险。当您的服务器关闭时您发送的电子邮件？
我总是建议人们选择第三方电子邮件提供商，因为它可以让您免去以后的麻烦 - 您只需等待电子邮件发送并到达收件箱即可，而无需担心任何事情。
（全面披露：我是 PostageApp 的产品经理，我们有很多人问我们为什么要寻求第三方解决方案。）
About how many emails are you sending per second/minute/hour that the third party service is having trouble with sending these out? Spam is always an issue and a risk when you are an email service provider, but unless you are sending out in the hundreds of thousands per hour, something tells me you would be okay.
When you are setting up your own email service to send large amount of emails, you should probably keep these in mind:
There are no real risks with rolling your own mail delivery service, aside from what happens if your IP gets blacklisted from major providers, and what happens to the emails you send when your server is down?
I always advise people to go for third party email providers because it will save you headaches going forward - you can just expect the email to be sent and arrive at the inbox and you won't have to worry about anything.
(Full Disclosure: I am the Product Manager of PostageApp, we have tons of people asking us why go for a third party solution.)