SMTP Server VS SMTP Service

Looking for recommendations for SMTP services or is it better to run our own SMTP server? We have tried SendGrid and DynECT, but have had suppression and time delay problems with both. Our system currently sends 15,000+ emails a day and the number is only growing everyday.  Our product depends on emails being delivered and in a timely manner.
pangotekAsked:
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Rsilva98Connect With a Mentor Commented:
hi,

If you send that amount of emails, you should have your own mail server instead of hosting one. Have your own mail server allows you to troubleshoot any issues immediately and fix the problem asap. while hanging on a mail host you never know what happens.
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Thomas GrassiSystems AdministratorCommented:
Postfix on Fedora works nicely

Exchange Server does the job especially if you are using Outlook clients

Febooti is a good command line smtp program
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