Sorry that sent before I finished typing. We are seeing huge spikes in those codes as well. Some testing shows that valid addresses are getting that response intermittently as well.
Tara Natanson Constant Contact On Mon, Dec 14, 2020 at 7:00 PM Tara Natanson <tara+mai...@natanson.net> wrote: > Heh, I just sent the same thing. We starte seeing it at 15:30 Eastern > US time. > > Tara > > On Mon, Dec 14, 2020 at 6:58 PM Bez Thomas via mailop <mailop@mailop.org> > wrote: > >> Anyone else seeing repeated, but intermittent, 550-5.1.1s from Gmail for >> valid addresses? >> >> Diagnostic-Code: smtp; 550-5.1.1 The email account that you tried to >> reach does not exist. Please try >> 550-5.1.1 double-checking the recipient's email address for typos or >> 550-5.1.1 unnecessary spaces. Learn more at >> 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser >> -- >> Bez Thomas >> >> >> >> _______________________________________________ >> mailop mailing list >> mailop@mailop.org >> https://list.mailop.org/listinfo/mailop >> >
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