Looks like a misconfiguration on the recipient’s server to me, especially if all other mails send correctly.
Sam MacAmbulance Ltd. Providing Affordable Mac/PC Support and Web Development Sam Mullen +44 (0)7747778022 <tel://+447747778022> [email protected] <mailto:[email protected]> www.macambulance.co.uk <https://www.macambulance.co.uk/> MacAmbulance Ltd. is a registered company in England & Wales, registration number 8466597 This email is intended solely for the addressed recipients and may contain privileged or confidential information. If you have received this email in error please notify the sender and delete the email immediately. > On 8 Aug 2019, at 21:00, 'Phil Tomlinson' via Sussex Mac User Group > <[email protected]> wrote: > > Dear SMUGGERS > > Can anyone explain this annoying email problem to me? > > I have been trying to send emails to a company. These emails get returned to > me saying > “550-Please turn on SMTP Authentication in your mail client. > 550-st43p00im-zteg10073501.me.com > <http://550-st43p00im-zteg10073501.me.com/> [17.58.63.180]:33051 is not > permitted to > 550 relay through this server without authentication. (in reply to RCPT TO > command)” > > All my other emails get sent successfully. I use Apple Mail and the iCloud > server. > > Phil > > -- > You received this message because you are subscribed to the Google Groups > "Sussex Mac User Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/smug/F85B3679-A260-47B8-8769-FA7197C056C0%40icloud.com > > <https://groups.google.com/d/msgid/smug/F85B3679-A260-47B8-8769-FA7197C056C0%40icloud.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "Sussex Mac User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/smug/F56D8ACB-2A01-4DDD-976A-40A7DB9D0DB5%40macambulance.co.uk.
