this post was submitted on 23 Nov 2023
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Any recommendation for outgoing mail relay provider? (alien.top)
submitted 11 months ago by [email protected] to c/[email protected]
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I've got a couple domains I selfhost and I used Spectrum's mail.twc.com smtp server for my smarthost. I few weeks ago I noticed I couldn't send mail to my gmail using my domains and never received a bounce back with the error. Today I started getting a error finally, but it looks like I can't send out anything that doesn't match my spectrum email. Trying to figure out my best course of action that is free. I only send around 200 emails/month across all my domains. I've got a oracle free tier but this might be against their TOS. It seems my options are resend or sendgrid free tiers?

Action: failed
Status: 5.1.0
Remote-MTA: dns; mail.twc.com
Diagnostic-Code: smtp; 550 5.1.0  sender rejected. The
email address you are sending as must match the email address you used to
auth. Please check your SMTP settings. AUP#Out-1500

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[โ€“] [email protected] 1 points 11 months ago

Hmmm. Is that actually a problem?

I'm just using SMTP server of my email provider, just like in my mail client. Never had any trouble over a couple hundred notifications I send per month. As added benefit, if your mail provider is large, it won't have problems with sending mail to gmail and such.