550 is indeed an SMTP error code which (usually) means that the recipient email address does not exist on the server anymore.
You can verify this by sending an email to that email address.
zogstrip
6
الموضوعات ذات الصلة
| الموضوع | الردود | مرات العرض | النشاط | |
|---|---|---|---|---|
| Getting error when changing e-mail address | 3 | 405 | 28 يونيو 2021 | |
| Email not sending - Domain Spoofing Prohibited | 3 | 2091 | 3 يناير 2022 | |
| 550-Verification Failed | 0 | 607 | 1 أكتوبر 2020 | |
| Discourse user email rejected by recipients what is the best practice for this user | 6 | 837 | 12 أغسطس 2021 | |
| Email Delivery Delay notification for a user account that added a email address that isn't available | 3 | 355 | 21 ديسمبر 2023 |