Am Wed, Dec 20, 2023 at 04:14:57PM +0100 schrieb Marco Moock: > Am 20.12.2023 um 16:11:05 Uhr schrieb Christoph Brinkhaus: > > > I have heard that there is a countermeasure against spam run be big > > mail providers by rejecting the first contact by SMTP and accepting > > the next contact. Most spammers seem to try just once. > > Do they reject with 5xx or 4xx? > Honestly I do not know.
Kind regards, Christoph
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