Cannot create a new account - verification email never received

[phd]

Creating a new account: unused username and email.
After pressing the Sign up button I'm forwarded to a page saying:

Email verification sent
Verification link has been sent to your email address. Your account will be created when you visit the verification link.
Make sure to check your spam folder.

But the verification email is never received (checked the Spam folder), even after several tries.

[zac343]

I traced the current registration path, and there is a useful boundary here:

• RegisterPost renders “Email verification sent” only after email.Send(...) returns nil.
• email.Send calls smtp.SendMail, so that page means the configured SMTP server accepted the message transaction; it does not prove the recipient server accepted it or that it reached the mailbox.

The fastest next check is therefore the mail queue, not another signup attempt: for one attempt timestamp, find the queue/message ID and then the final outbound state (sent, deferred, or bounced) plus the exact remote SMTP reply. If there is no queue ID despite the success page, verify which relay Secrets.EmailServer points to. If there is a queue ID, the final Postfix/relay line identifies the first failing boundary.

The public DNS baseline currently looks healthy: one MX, a terminating -all SPF policy, default DKIM, DMARC quarantine, MTA-STS enforce, TLS-RPT, and matching forward/reverse DNS for mail.userstyles.world. That makes a generic “missing DNS record” explanation less likely, though the actual outbound IP and received Authentication-Results still need to be checked. The message builder also does not add Date or Message-ID itself, so it is worth confirming the MTA adds both before delivery.

Reproducible public snapshot (no login, public DNS only): https://mailcheck.agentcartai.com/?domain=userstyles.world&dkimSelector=default&autostart=1&utm_source=github&utm_medium=issue_comment&utm_campaign=userstyles_verification_missing_396