# Slow Email Sending via mautic:broadcast:send — Need help optimizing for large volumes

**URL:** <https://forum.mautic.org/t/slow-email-sending-via-mauticsend-need-help-optimizing-for-large-volumes/35473>\
**Category:** General Discussion\
**Tags:** email, mautic-5\
**Created:** [April 7, 2025, 2:47pm UTC](https://forum.mautic.org/t/slow-email-sending-via-mauticsend-need-help-optimizing-for-large-volumes/35473 "2025-04-07T14:47:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![camargo\_o](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/camargo_o/32/13796_2.png) [@camargo\_o](https://forum.mautic.org/u/camargo_o)\
**Post date:** [April 7, 2025, 2:47pm UTC](https://forum.mautic.org/t/slow-email-sending-via-mauticsend-need-help-optimizing-for-large-volumes/35473/1 "2025-04-07T14:47:04Z")

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Hi everyone,

I’m currently sending email campaigns using **Channels → Emails** in Mautic, with the `mautic:broadcast:send` cronjob handling the process.

However, the sending speed is quite slow — around **4.76 emails per second** (about 10,000 emails take ~35 minutes). This becomes a major bottleneck when I need to send large volumes, anywhere from **100k to 500k emails** , which ends up taking almost the entire day.

I’m using **Amazon SES** , and it’s not the bottleneck — it allows for much higher throughput.  
I already went through [this helpful blog post](https://joeykeller.com/mautic-5-cronjobs) by Joey Keller, which helped me improve performance a bit, but I’m still far from what SES can handle.

Does anyone have tips or best practices to **increase the sending speed of `mautic:broadcast:send`** for high-volume campaigns?

Here’s some additional context:

- Mautic version: 5
- PHP version: 8.1.31
- Emails are well-structured and clean HTML.
- Database seems fine, no major slow queries during sends

Any help or insights would be greatly appreciated!

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**Author:** ![ricfreire](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/ricfreire/32/14973_2.png) [@ricfreire](https://forum.mautic.org/u/ricfreire)\
**Post date:** [April 7, 2025, 2:59pm UTC](https://forum.mautic.org/t/slow-email-sending-via-mauticsend-need-help-optimizing-for-large-volumes/35473/2 "2025-04-07T14:59:14Z")

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Hello @camargo_o

There are various topics already created, regarding how to send emails faster. @joeyk has done a video and an article, that explains in great detail what you can do to improve it.

[![](https://us1.discourse-cdn.com/flex020/uploads/mautic/original/2X/7/7b30d146c1cf7661c99d2f17d6a3faba1040d204.jpeg "Send Emails 10x faster with Mautic 4") ](https://www.youtube.com/watch?v=BOdK5RcAnMw)

Hope I helped you out.  
Best regards,  
Ricardo