$ errors.fyi/smtp/252 74 namespaces · 3,092 codes

smtp · smtp/252

252

Cannot verify user, will attempt delivery

The server cannot verify the recipient exists (VRFY is not supported or the user is unverifiable), but will attempt delivery anyway.

References

rfc-editor.org/rfc/rfc5321

In this namespace

← previous 251 User not local; will forward next → 334 Server AUTH challenge

220 221 235 250 251 252 334 354 421 422 431

» community-maintained · contribute on GitHub npm i -g errors-fyi && errorfyi ENOENT