SMTP protocol is responsible for e-mail sending. SMTP errors mean that e-mails have not been sent. Every message contains an error code by which the problem and ways of its solving can be figured out. The most widespread errors are listed below.
In case you did not find your answer contact us
Is it possible to check e-mail using mail programs installed on computer or phone (Outlook, Thunderbird, TheBat etc.)?
Automatic copying of the mail from mail servers and other providers (Google/Hotmail/Yahoo) to your mailbox