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mail‑pl1‑fxxx.google.com
Question asked by Sabatino - 10/30/2025 at 9:34 AM
Answered
Do you know what the SMTP servers mail-pl1-fxxx.google.com are?

They're filling me up with junk.
They're not Google's delivery servers, what are they?
Sabatino Traini
      Chief Information Officer
Genial s.r.l. 
Martinsicuro - Italy
D
Douglas Foster Replied
10/31/2025 at 8:35 AM
Marked As Answer
I just checked my logs, using a wildcard in place of xxx.   They appear to be a normal Google server.  I see legitimate messages from known domains and gmail accounts.   I don't have an excessive volume at present.
Sabatino Replied
11/3/2025 at 12:37 AM
Yes.
It was a specific sender domain.
I think it was due to a mailing list configuration error.
Google's servers took a while to stop it. I wonder if they even intervene in these cases. I solved it by putting the domain in SMTPBlock.
Sabatino Traini Chief Information Officer Genial s.r.l. Martinsicuro - Italy
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