Mail sending solutions? | Web Hosting Talk

Hi, I have multiple servers running Ubuntu Plesk with a decent amount of customers.

Currently, I setup Send In Blue (SIB) SMTP for the servers so that customers who send mail using Roundcube don’t go through my own IP but instead go through Send In Blue’s.

This has a couple issues:

1. The DKIM signature is valid but the DKIM domain is instead of the From Domain, so DMARC is not aligned. This results in an “Unverified” tag when delivering to a Microsoft Exchange address, not delivering at all, or it goes into spam. Gmail is also hit or miss.

2. When it does deliver, Google sees the emails as Promotional because SIB is mostly used for marketing and transactional, not professional email

3. As a result of the way I have it configured, WordPress installations can’t access the SMTP or send mail, so unless an SMTP plugin is installed in WordPress, the mail simply fails.

I’ve been searching for a solution for months and I’m ready to pull my hair out.

Mailchannels isn’t an option because they dropped outbound filtering support for Plesk recently and their prices are high for me. I’m willing to reconsider the price if I knew it would work with my system flawlessly…

Mxroute, I don’t even know where to begin. Honestly a bit confused with what they have to offer.

Mailbaby was recommended to me by Mxroute but I can’t get any solid answers on how to configure it properly so that I don’t stumble into the same issues I have with SIB.

Does anyone have any experience with this? Mail is extremely important to me as a hosting provider and to my customers.

I appreciate any help or suggestions that can get me moving in the right direction

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