c# - SmtpClient error when recipient list is 101 email address -

c# - SmtpClient error when recipient list is 101 email address -

is there limitation on size of recipient list? have simple programme read email address database , sends out email attachment. works fine when test 3 email address below error when utilize finish recipient list of 101.

unable read info transport connection: established connection aborted software in host machine.

it's hard tell provided should aware when you're sending email smtp server, looks @ recipients before accepting of info , lookup each email address before continues. sometimes, smtp servers bit slow lookup , tend time out. issue , if is, it's pretty much out of command unless own mail service server , can tweak in way.

c# email