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
sendgrid works for me.
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.
Many suggest Amazon SES as it is dead ass cheap. Free tier SMPT relay services often add advertising lines or other shenanigans to mails. I use mailjet but it is quiete expensive. I send under 10k mails per month but sadly most SMPT services do not have small/mid tiers.