Sending 500K Emails one Time?

[Nikolaos]

I have an email list of 500k contacts. I want to send an offer to them all without landing into spam. I only need to send 1 email, one time. If the domain is blacklisted afterwards it's OK.

Any services you recommend that would allow me to create a new domain, and get started today?

It's not possible to send 500k emails at once.

 

[code API]

There are many email servers that can handle this volume without and it doesn't always have to be done with an SMTP. Use a solution that relays mass email via API.

 

[bitoshi]

it is better to do this gradually and use some kind of high-quality mailing program

 

[emily_emi]

I recommend you top 3 best email server providers:
SMTPget
Sendinblue
SMTPmart

 

[spoorleads]

SMTPmart ripper dont deal with he ripp me with 400 euro indian ripper dont fall on those sites

 

[starkrobb]

• For one-time high-volume sends, SMTPwire offers warmed-up SMTPs with solid inbox rates.
• DedicatedSMTPserver gives you full control with root access, perfect for bulk pushes.
• And before sending, I always prep my domain/IP using WarmupSMTP — makes a huge difference in inboxing.

If you're planning a 500K+ send, don't skip warm-up and proper list hygiene. These tools have worked consistently for me over the years.

 

[MadelynWard]

Sending 500K emails at once can trigger spam filters. Use a trusted email marketing service and send in smaller batches.

 

[StealthNexus]

Hi,


For a one-time email blast to such a large list, your best bet is to use a dedicated SMTP server with a fresh domain and IP that’s not flagged yet. You can:

1. Set up your own SMTP/VPS – For example, use a provider like Contabo or Hetzner, configure Postfix/Exim, and warm up the IP slightly (even a few test sends can help).
2. Use transactional mail services that allow high volume – Providers like Mailgun or SendGrid usually block spam-like behavior, so you’d likely need a more flexible bulk provider.
3. Specialized bulk email services – Some services like MailWizz (self-hosted) + PowerMTA or MailerQ on a VPS give you full control.

Since domain reputation doesn’t matter for you afterwards, just register a new domain (preferably with a reputable registrar), set up correct SPF, DKIM, DMARC records to avoid instant spam filters, and send through a clean IP.

 

[quimao]

• For one-time high-volume sends, SMTPwire offers warmed-up SMTPs with solid inbox rates.
• DedicatedSMTPserver gives you full control with root access, perfect for bulk pushes.
• And before sending, I always prep my domain/IP using WarmupSMTP — makes a huge difference in inboxing.

If you're planning a 500K+ send, don't skip warm-up and proper list hygiene. These tools have worked consistently for me over the years.

Sending 500K emails at once can trigger spam filters. Use a trusted email marketing service and send in smaller batches.

Hi,


For a one-time email blast to such a large list, your best bet is to use a dedicated SMTP server with a fresh domain and IP that’s not flagged yet. You can:

1. Set up your own SMTP/VPS – For example, use a provider like Contabo or Hetzner, configure Postfix/Exim, and warm up the IP slightly (even a few test sends can help).
2. Use transactional mail services that allow high volume – Providers like Mailgun or SendGrid usually block spam-like behavior, so you’d likely need a more flexible bulk provider.
3. Specialized bulk email services – Some services like MailWizz (self-hosted) + PowerMTA or MailerQ on a VPS give you full control.

Since domain reputation doesn’t matter for you afterwards, just register a new domain (preferably with a reputable registrar), set up correct SPF, DKIM, DMARC records to avoid instant spam filters, and send through a clean IP.

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